Thank you for this video Dr. Grande. I cannot stress enough how helpful it is to have the visual along with the explanation of how to do the test and what the numbers mean. It begins to get overwhelming the more tests that are being shown throughout all the different videos, so having both visual and explanation helps ease the stress a little bit.
While I have little experience with Excel and SPSS, I found the video presentation to be very informative. Dr. Grande provided a useful explanation of the material. I appreciated how he walks the viewer through the process of performing a t-test. With more practice and further discussion, I hope to strengthen my knowledge and abilities in this area.
Paired Sample T-tests was one of the tests that I had learned a lot about in my undergraduate program. As I learn more and more about psychological statistics I have found that each instructor has a very different teaching style. I am much more of a visual learner and this helped refresh my memory of running a Paired Samples T-Test in SPSS.
Great, straightforward video that shows how a T Test in SPSS calculates if there is a statistically significant difference in the means of the pretest and posttest data.
The steps used are very helpful to compare differences between the pretest, posttest, and T-test results. It was amazing how the Excel chart calculated the mathematical formula after inputting numbers from the results in SPSS. Statistics scares me, but interpreting statistical data seems fun after watching this video. The steps were easy to follow and very straightforward, especially for beginners.
I find it fascinating regarding the many ways one can use various tools to determine the results and efficacy of testing. I wish I knew more about it because It would greatly help me understand the "why" of things. As always, the videos help to gain a better understanding and are much appreciated!
This is another reason that I am glad I watched the videos in order, because the concept of T-tests came up again, which I was confused about in earlier videos. I also like how it was related to pretests and posttests. I plan to use those in my research proposal so I think this would be a video worth saving.
I enjoyed this video as the it was easy to follow. The example of SU was a great one to understand. Checking for significant differences between pre-test and post-test with participants who use substances made understanding paired samples easy to understand.
Wow, I had forgotten how much goes into, and how much you can get from, a T-test! What a valuable tool to interpret data. Looking at pre and post test data is vital to a research project because it shows the difference during the experiment. I don't think I will use pre and post tests for my research proposal, but I will definitely need to remember this in the future.
I remember reviewing T-tests when I took an undergrad research course years ago. I did not think they were very important until after watching this video. I agree that it serves an extremely valuable purpose of highlighting the differences in the pretest and posttest. I think it is great that SPSS and Excel have the tools and formulas to help you calculate the data.
It has been almost three years since I used SPSS in undergraduate classes so this was a good refresher. Will also be helpful when doing my own research paper to better understand the material that I am reading and where it came from.
I am glad that this video is here to refer to. It was nice to see the differences between the different scores on the pretest and the post test. I am not quite sure what I will use for my research proposal yet, but I know that if I use that, I will be referring back to this video because everything was explained so well.
This video made it very clear to me that what I need to run for my research proposal is a paired samples T-test since I will have a post- test and a pre-test. This was very helpful to me. It also served as a great reminder of how to interpret the read-outs for SPSS when doing this type of test.
Mandy Moore This would definitely be beneficial for you to utilize for your research. I would be interested in actually being able to use the program to compare and contrast pretest and post-test.
I felt that this was easy to follow in order to see the difference between the pretest and post test scores and why it is significant. The SPSS portion was very clear and concise. The more I see SPSS, the more I feel like I would like the program better than excel.
Melissa Clendaniel Even though I have never used SPSS I get the same feeling that it would be easier to navigate and use than Excel. I really like Dr. Grande's videos because without them I would have never heard of or seen SPSS in action.
I like the fact that this video made it easier to learn the comparison of data sets. I didn't know that you could use SPSS and Excel together. I thought they were separate programs and whichever program you used initially, you had to stick to that program.
I enjoy all your videos I find your pace when you talk very good, your explanation and you clarify things. You are a great teacher. Thank you so much Dr Grande. I have been your student via your tube videos for the past four years. I am just not sure about my question below. It is about a negative difference between my pretest and post-test scores (see my previous comment).
Kaitlyn, I'm going to attempt to answer your question. The effect size is strong because it is over .8. I think the scale is .2 is weak, .5 is moderate and over .8 is strong. Great video Dr. Grande, thanks.
In this video we had to find out if there a difference between the post test and pre-test scores. We would use a paired samples t-test to compare two means and see if they are different. Once again very neat to see how this all unfolds!
Toniette Morda I think that Dr. Grande explained this all very well. It made sense and was easy to follow. i think that even if you hadn't seen SPSS before you would be able to use this video to effectively run a paired samples t-test in SPSS
It is obvious that using the paired samples T-test is excellent for calculating pre-tests and post-tests and comparing the scores. This is so applicable to the field of counseling (and our fictitious research proposal) because you can measure to see if there is a relationship or any implications in the effectiveness of the type of therapeutic technique used or measures administered.
I forgot to also mention how valuable a paired samples T-test is to the counseling field. I believe this is one reason why I found the video so interesting and fun.
I found this video to be a little more complex but it was easy to follow. I think this video will help me with my research paper because this is an important test to use.
Just a note, I am not sure if this account is the same one I've been posing with. I know Firefox decided to add a really old picture of me for some reason so just in case, this is still Alicia Zahn, just posting from a different web browser that doesn't want to cooperate. That having been said, I liked this video. It was quick, easy, and highly applicable to the research paper. Pre and post test is something I am a strong supporter of in research because it adds to the strength of the results statistically and argumentatively. I thought this function was really easy since it is labeled as being a paired samples t-test in SPSS and therefore not hard to find. I also enjoyed the inclusion of the formula to get Cohen's D. I appreciate Dr. Grande sharing how to calculate it in Excel but I think a calculator would be my preference since it's a very simple formula.
Thank you for the information and a thorough explanation. This statistical information is confusing to me but the reinforcement of terms and meaning i the videos are helpful.
Although this information was somethat foreign to me, it helped that you explained it thoroughly. I can remember when I first learned how to do statistics it was a lot of manual calculations. SPSS allows the calculations to be done in the blink of an eye. I can't wait to learn more about using SPSS
I agree. Some of the terms seem foreign to me but the calculations seem pretty simple. Hopefully the explanation will become more clear as we move along. I think this would be a useful tool for my topic.
I agree with both of you. This was a good explanation of the t-test. I will definately be using this for my topic. It is amazing how quickly we can now have the answer
This video is very helpful in determining the differences between pretest and post-test scores, which is useful as I continue to work on my research proposal. This video was extremely straightforward and I find it beneficial in learning how to use SPSS during research. I am, however, unfamiliar with cohen's d, which I believe is a representation of effect size if I understand the concept correctly.
Jacklin Skibicki After watching this, I realized how important it is to give both pre- and post-tests in a research study. That way, you can at least attempt to measure whether or not there was any therapeutic change as a result of the study or technique used.
I was slightly lost again with this video. I plan on using a pre and posttest for my research proposal so I will need to rewatch this video to enhance my understanding.
For my research proposal results, I will probably need to run one of these T Test since I will have a pretest and a post-test to see if there was a change due to a particular treatment plan. This was a good example and I hope I can figure out how to do it on my own in Excel.
Bethany Elstrom Exactly my thoughts while watching the video! I think most of us (if not all of us) are doing some measure of pre-test, post-test so this is test to keep in mind when we get into writing the methods section of our papers.
Again, enjoyed seeing the new version of SPSS and how to run a paired samples t-test and interpret the results. Although I still need some brushing up on terminology.
Organizing pre and post test data is extremely important. I learned some important information to apply to my research. I would like to actually use this system hands on. I think I would get a better understanding as opposed to just watching it.
***** I agree that organizing the pre and posttest data is very important. I will definitely need to consider that in my research proposal. I also have never used SPSS, and I think it may be easier to understand it by doing it hands on.
***** Yes, I agree that the pre and post test data is important. It would really be interesting to use this hands on in person, as you mentioned. It is really nice to see how it works form the video, but doing it ourselves in person would be interesting!
Yes I like the charts in spss since it gives you plenty of information. It's nice to be able to use both programs like in this case Dr. Grande used a formula in excel but used statistics obtained from spss.
I thought this might be a useful tool for my topic, but now not sure. I will have participants in two different groups using the same assessment tool in order to compare them. I will be sure to ask about this in class this coming week.
Dr. Grande, Thank you for these great videos. They are very helpful. I have two question ns which I hope you can help me with:1. What tests for assumptions do I need to conduct first to run this t-test?2. Sometimes the mean difference is negative because the pre-test score is lower. Is it appropriate to display this differences as negative? Or should I just switch the two variables? The absolute value of the difference remains the same.Thank you!
I am actually very interested in using this, I love that you can compare to sets of data collection and it is simple to read and and each separated into their own box. If I were to conduct research that involved a pretest and post-test I would definitely use this.
I noticed excel was an added help in doing some calculations. The end was confusing. Again once numbers are entered, the program does the rest. You just have to know where to place them. Have to continue practicing the terms to be more familiar.
I plan to use a pretest/posttest for my research proposal. Therefore, this may be useful later on. However, I did not understand it very well. It was a little complex, and I definitely need more clarification on this video because it went over my head.
Rachel Foster I am right with you on this one. All of these videos are pretty complicated. Even when other people say it is straight forward, sometimes I am still lost at the very beginning. Glad to know I wasn't the only one a little lost here.
Jessie Howard Rachel, Jessie, I felt a little lost with this one too. For me, as Dr. Grande explained it, it was easy to follow along with him. However, I just felt lost when the video ended.
Rachel Foster I also plan using a pretest and posttest for my research proposal. And I agree that I do not fully grasp the concepts presented in this video.
Danielle Maldonado I feel the same way. I am pretty sure that I understand but not positive. It is difficult when looking at a program that I have never been able to use before but at the same time it is easy to see how the different functions work inside the program when displayed.
Hi Dr Grande what happens if the difference between the pretest scores and their posttest scores has as negative values. Due to the fact the pretest mean scores is lower than the posttest mean score? I noticed that my calculated effect size has a negative value. Does this mean that the treatment has had no effect?. I changed my data on IBM SPSS and put posttest-pretest I got the same values the change is that I had a positive value. Can one do that? as capture posttest first then pretest last?
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Thank you for this video Dr. Grande. I cannot stress enough how helpful it is to have the visual along with the explanation of how to do the test and what the numbers mean. It begins to get overwhelming the more tests that are being shown throughout all the different videos, so having both visual and explanation helps ease the stress a little bit.
While I have little experience with Excel and SPSS, I found the video presentation to be very informative. Dr. Grande provided a useful explanation of the material. I appreciated how he walks the viewer through the process of performing a t-test. With more practice and further discussion, I hope to strengthen my knowledge and abilities in this area.
Paired Sample T-tests was one of the tests that I had learned a lot about in my undergraduate program. As I learn more and more about psychological statistics I have found that each instructor has a very different teaching style. I am much more of a visual learner and this helped refresh my memory of running a Paired Samples T-Test in SPSS.
Great, straightforward video that shows how a T Test in SPSS calculates if there is a statistically significant difference in the means of the pretest and posttest data.
The steps used are very helpful to compare differences between the pretest, posttest, and T-test results. It was amazing how the Excel chart calculated the mathematical formula after inputting numbers from the results in SPSS. Statistics scares me, but interpreting statistical data seems fun after watching this video. The steps were easy to follow and very straightforward, especially for beginners.
I find it fascinating regarding the many ways one can use various tools to determine the results and efficacy of testing. I wish I knew more about it because It would greatly help me understand the "why" of things. As always, the videos help to gain a better understanding and are much appreciated!
This clarified the purpose of the Levene's test and gave a good example of using independent samples t test.
Thanks for the step-by-step directions and for the explanation of how to interpret the output.
This is another reason that I am glad I watched the videos in order, because the concept of T-tests came up again, which I was confused about in earlier videos. I also like how it was related to pretests and posttests. I plan to use those in my research proposal so I think this would be a video worth saving.
Thanks Dr. Grande, this was the first time I have learned Cohen's D. You made it easy to understand.
The data was very straight forward in determining if the results were statistically significant. Excel tools are cool.
Again, I liked the t-test samples and the display on SPSS. I may need to watch this one more time but I am not completely lost.
I enjoyed this video as the it was easy to follow. The example of SU was a great one to understand. Checking for significant differences between pre-test and post-test with participants who use substances made understanding paired samples easy to understand.
This helps clear things up a bit. These different tests were starting to get intimidating. I'm gonna use this one for my research proposal.
Wow, I had forgotten how much goes into, and how much you can get from, a T-test! What a valuable tool to interpret data. Looking at pre and post test data is vital to a research project because it shows the difference during the experiment. I don't think I will use pre and post tests for my research proposal, but I will definitely need to remember this in the future.
I remember reviewing T-tests when I took an undergrad research course years ago. I did not think they were very important until after watching this video. I agree that it serves an extremely valuable purpose of highlighting the differences in the pretest and posttest. I think it is great that SPSS and Excel have the tools and formulas to help you calculate the data.
It has been almost three years since I used SPSS in undergraduate classes so this was a good refresher. Will also be helpful when doing my own research paper to better understand the material that I am reading and where it came from.
I am glad that this video is here to refer to. It was nice to see the differences between the different scores on the pretest and the post test. I am not quite sure what I will use for my research proposal yet, but I know that if I use that, I will be referring back to this video because everything was explained so well.
This video made it very clear to me that what I need to run for my research proposal is a paired samples T-test since I will have a post- test and a pre-test. This was very helpful to me. It also served as a great reminder of how to interpret the read-outs for SPSS when doing this type of test.
Mandy Moore Yes! very true you would use a T-test since you have a post and pre-test
Mandy Moore This would definitely be beneficial for you to utilize for your research. I would be interested in actually being able to use the program to compare and contrast pretest and post-test.
Mandy Moore I agree, I will likely use this in my research proposal as well! Definitely useful.
Mandy Moore I agree! I will be using this in my research proposal.
Yes, this is definitely what you want to use.
This video was very clear and straight forward . I can see why this will be a use full tool to have.
I agree that the affect size was pretty straight forward to calculate. Analyzing data on pretest and pos test is very important in research .
I felt that this was easy to follow in order to see the difference between the pretest and post test scores and why it is significant. The SPSS portion was very clear and concise. The more I see SPSS, the more I feel like I would like the program better than excel.
Melissa Clendaniel Even though I have never used SPSS I get the same feeling that it would be easier to navigate and use than Excel. I really like Dr. Grande's videos because without them I would have never heard of or seen SPSS in action.
Thank you for this video, Dr. Grande. As a visual learner, it was nice for me to be able to see how the t-test is used and results calculated.
This was easier to understand than some of the other videos.
I like the fact that this video made it easier to learn the comparison of data sets. I didn't know that you could use SPSS and Excel together. I thought they were separate programs and whichever program you used initially, you had to stick to that program.
Jasmine Aviles yes i was under the impression that you picked one.
I enjoy all your videos I find your pace when you talk very good, your explanation and you clarify things. You are a great teacher. Thank you so much Dr Grande. I have been your student via your tube videos for the past four years. I am just not sure about my question below. It is about a negative difference between my pretest and post-test scores (see my previous comment).
Kaitlyn, I'm going to attempt to answer your question. The effect size is strong because it is over .8. I think the scale is .2 is weak, .5 is moderate and over .8 is strong. Great video Dr. Grande, thanks.
In this video we had to find out if there a difference between the post test and pre-test scores. We would use a paired samples t-test to compare two means and see if they are different. Once again very neat to see how this all unfolds!
Toniette Morda I think that Dr. Grande explained this all very well. It made sense and was easy to follow. i think that even if you hadn't seen SPSS before you would be able to use this video to effectively run a paired samples t-test in SPSS
Toniette Morda It was very informative to see the pre and post test scores calculated. I didn't realize SPSS also performed this function.
It is obvious that using the paired samples T-test is excellent for calculating pre-tests and post-tests and comparing the scores. This is so applicable to the field of counseling (and our fictitious research proposal) because you can measure to see if there is a relationship or any implications in the effectiveness of the type of therapeutic technique used or measures administered.
Jessica Muzzin Paired samples t-test does seem applicable in the MH field. It is straight forward and the stats are easy to understand.
Michelle Robinson I agree that it does seem to be applicable in the MH field.
I forgot to also mention how valuable a paired samples T-test is to the counseling field. I believe this is one reason why I found the video so interesting and fun.
I found this video to be a little more complex but it was easy to follow. I think this video will help me with my research paper because this is an important test to use.
Just a note, I am not sure if this account is the same one I've been posing with. I know Firefox decided to add a really old picture of me for some reason so just in case, this is still Alicia Zahn, just posting from a different web browser that doesn't want to cooperate. That having been said, I liked this video. It was quick, easy, and highly applicable to the research paper. Pre and post test is something I am a strong supporter of in research because it adds to the strength of the results statistically and argumentatively. I thought this function was really easy since it is labeled as being a paired samples t-test in SPSS and therefore not hard to find. I also enjoyed the inclusion of the formula to get Cohen's D. I appreciate Dr. Grande sharing how to calculate it in Excel but I think a calculator would be my preference since it's a very simple formula.
Very straightforward viedo and easy to understand how to calculate effect size using cohen's d in excel.
Thank you for the information and a thorough explanation. This statistical information is confusing to me but the reinforcement of terms and meaning i the videos are helpful.
Although this information was somethat foreign to me, it helped that you explained it thoroughly. I can remember when I first learned how to do statistics it was a lot of manual calculations. SPSS allows the calculations to be done in the blink of an eye. I can't wait to learn more about using SPSS
I agree. Some of the terms seem foreign to me but the calculations seem pretty simple. Hopefully the explanation will become more clear as we move along. I think this would be a useful tool for my topic.
I agree with both of you. This was a good explanation of the t-test. I will definately be using this for my topic. It is amazing how quickly we can now have the answer
This video is very helpful in determining the differences between pretest and post-test scores, which is useful as I continue to work on my research proposal. This video was extremely straightforward and I find it beneficial in learning how to use SPSS during research. I am, however, unfamiliar with cohen's d, which I believe is a representation of effect size if I understand the concept correctly.
Jacklin Skibicki After watching this, I realized how important it is to give both pre- and post-tests in a research study. That way, you can at least attempt to measure whether or not there was any therapeutic change as a result of the study or technique used.
Right! Back in the day during my first stats classes, I don't think that was ever brought up! Glad we can accurately test before and after treatment.
I was slightly lost again with this video. I plan on using a pre and posttest for my research proposal so I will need to rewatch this video to enhance my understanding.
For my research proposal results, I will probably need to run one of these T Test since I will have a pretest and a post-test to see if there was a change due to a particular treatment plan. This was a good example and I hope I can figure out how to do it on my own in Excel.
Bethany Elstrom Exactly my thoughts while watching the video! I think most of us (if not all of us) are doing some measure of pre-test, post-test so this is test to keep in mind when we get into writing the methods section of our papers.
Seems straight-forward. Will review the excel video as I am unfamiiar with calculating Cohen's D. Thanks
Again, enjoyed seeing the new version of SPSS and how to run a paired samples t-test and interpret the results. Although I still need some brushing up on terminology.
Alaina Van Gelder I need brushing up as well! I'm resolved that I will be watching this video several more times!
+Megan Blackwell I agree. I'll watch this one again as well.
Organizing pre and post test data is extremely important. I learned some important information to apply to my research. I would like to actually use this system hands on. I think I would get a better understanding as opposed to just watching it.
***** I agree that organizing the pre and posttest data is very important. I will definitely need to consider that in my research proposal. I also have never used SPSS, and I think it may be easier to understand it by doing it hands on.
***** Yes, I agree that the pre and post test data is important. It would really be interesting to use this hands on in person, as you mentioned. It is really nice to see how it works form the video, but doing it ourselves in person would be interesting!
***** Putting it to use would definitely make it easier to remember and understand.
Straight forward video with a great deal of useful information! SPSS looks really nice to use.
Yes I like the charts in spss since it gives you plenty of information. It's nice to be able to use both programs like in this case Dr. Grande used a formula in excel but used statistics obtained from spss.
I thought this might be a useful tool for my topic, but now not sure. I will have participants in two different groups using the same assessment tool in order to compare them. I will be sure to ask about this in class this coming week.
Dr. Grande, Thank you for these great videos. They are very helpful. I have two question ns which I hope you can help me with:1. What tests for assumptions do I need to conduct first to run this t-test?2. Sometimes the mean difference is negative because the pre-test score is lower. Is it appropriate to display this differences as negative? Or should I just switch the two variables? The absolute value of the difference remains the same.Thank you!
I am actually very interested in using this, I love that you can compare to sets of data collection and it is simple to read and and each separated into their own box. If I were to conduct research that involved a pretest and post-test I would definitely use this.
Candace Fernandez Agreed. It was also cool to see how you could use SPSS and Excel together to figure out other data (like the effect size).
Candace Fernandez I would use this as well Candace! Very user friendly and easy to follow instructions if I were to do research.
The explanation was very helpful.
Very helpful video, especially how to use Excell to calcuate Cohen's d
Thank you Dr. Grande for the info!
I appreciate you going over the formula in Excel. How did you know the effect size was significant? What are those value ranges?
This function seems to compare the means between two related groups on same continuos, dependent variables.
I can see this video, formula, being very useful in most research. Also as a general statement, I still prefer Excel to SSPS.
Susan Wilder The way he presented it in this video Excel does seem to be more user friendly.
I noticed excel was an added help in doing some calculations. The end was confusing. Again once numbers are entered, the program does the rest. You just have to know where to place them. Have to continue practicing the terms to be more familiar.
Grateful for these videos!
Very helpful video. Thank you!
I plan to use a pretest/posttest for my research proposal. Therefore, this may be useful later on. However, I did not understand it very well. It was a little complex, and I definitely need more clarification on this video because it went over my head.
Rachel Foster I will probably be using this in my proposal also so I would have like to have seen it done in Excel since we will not be using SPSS.
Rachel Foster I am right with you on this one. All of these videos are pretty complicated. Even when other people say it is straight forward, sometimes I am still lost at the very beginning. Glad to know I wasn't the only one a little lost here.
Jessie Howard Rachel, Jessie, I felt a little lost with this one too. For me, as Dr. Grande explained it, it was easy to follow along with him. However, I just felt lost when the video ended.
Rachel Foster I also plan using a pretest and posttest for my research proposal. And I agree that I do not fully grasp the concepts presented in this video.
Great explanations.
I'n ot sure if you already have a video on effect size, Dr. Grande. But one might help ne understand this terminology.
This was a quick little display running a T Test. Not sure if I grasped how to enter all the data, but the concept seems easy-ish.
Danielle Maldonado I feel the same way. I am pretty sure that I understand but not positive. It is difficult when looking at a program that I have never been able to use before but at the same time it is easy to see how the different functions work inside the program when displayed.
oops! The comment below was for the one sample and independent sample T-test.
The cohens d was a little confusing for me, I am still unfamiliar with it. However this video was great for pre and post test data.
Hi Dr Grande what happens if the difference between the pretest scores and their posttest scores has as negative values. Due to the fact the pretest mean scores is lower than the posttest mean score? I noticed that my calculated effect size has a negative value. Does this mean that the treatment has had no effect?. I changed my data on IBM SPSS and put posttest-pretest I got the same values the change is that I had a positive value. Can one do that? as capture posttest first then pretest last?
I thought you used one or the other software.