Kruskal-Wallis tests and many other analyses are covered in my book, SPSS Made Easy: www.amazon.co.uk/SPSS-Made-Easy-Statistical-Researchers/dp/B0DJGR4Z5K
Thank you for this. I have ran the test but I am confused how to interpret the results. I am comparing anxiety scores for parents of autistic and neurotypical children. The three groups in the study are : Mums of autistic children, mums of neurotypical children, and dads of neurotypical children (no dads of autistic children were able to be recruited). I have found a statistically significant difference between mums of autistic children and mums of neurotypical children. But what does not make sense to me, is that if there is no difference between Mums of neurotypical children and Dads of neuorotypical children, then surely there should be a significant difference between Dads of neuortypical children and Mums of autistic children, yet this was found to not be significant. Can my sample size influence this? I had much much fewer Dads take part than mums?
Hi Gemma, thanks for your question. It might relate to the size of the differences. For example, anxiety could be much higher in mums of autistic children than in mums of non-autistic children (hence the significant difference), and it could be only slightly higher in dads of non-autistic children compared to mums of non-autistic children (hence the non-significant difference). In this case, the difference between anxiety in mums of autistic children and dads of non-autistic children would be smaller than the difference between anxiety in mums of autistic children and mums of non-autistic children, which could explain why the differences between these pairs were significant and non-significant, respectively. You would have to look at, e.g., the medians to see whether this is a possible explanation. If not, yes, as you suggest, it could just be that the test has less statistical power when focused on the dads as there are fewer of them.
@@DavidRobinsonPhD Thank you so much this does confirm what I was thinking. Median anxiety for female caregivers of autistic childre n= 32.5, 11.25 = male caregivers of neurotypical children, 7.5= female caregivers of neurotypical children, score out of 100. (higher the number greater the anxiety)
![Summer Walker - Heart Of A Woman [Official Lyric Video]](http://i.ytimg.com/vi/SFddctbZzw8/mqdefault.jpg)
Kruskal-Wallis tests and many other analyses are covered in my book, SPSS Made Easy:
www.amazon.co.uk/SPSS-Made-Easy-Statistical-Researchers/dp/B0DJGR4Z5K
Thank you for this. I have ran the test but I am confused how to interpret the results. I am comparing anxiety scores for parents of autistic and neurotypical children. The three groups in the study are : Mums of autistic children, mums of neurotypical children, and dads of neurotypical children (no dads of autistic children were able to be recruited). I have found a statistically significant difference between mums of autistic children and mums of neurotypical children. But what does not make sense to me, is that if there is no difference between Mums of neurotypical children and Dads of neuorotypical children, then surely there should be a significant difference between Dads of neuortypical children and Mums of autistic children, yet this was found to not be significant. Can my sample size influence this? I had much much fewer Dads take part than mums?
Hi Gemma, thanks for your question. It might relate to the size of the differences. For example, anxiety could be much higher in mums of autistic children than in mums of non-autistic children (hence the significant difference), and it could be only slightly higher in dads of non-autistic children compared to mums of non-autistic children (hence the non-significant difference). In this case, the difference between anxiety in mums of autistic children and dads of non-autistic children would be smaller than the difference between anxiety in mums of autistic children and mums of non-autistic children, which could explain why the differences between these pairs were significant and non-significant, respectively. You would have to look at, e.g., the medians to see whether this is a possible explanation. If not, yes, as you suggest, it could just be that the test has less statistical power when focused on the dads as there are fewer of them.
@@DavidRobinsonPhD Thank you so much this does confirm what I was thinking. Median anxiety for female caregivers of autistic childre n= 32.5, 11.25 = male caregivers of neurotypical children, 7.5= female caregivers of neurotypical children, score out of 100. (higher the number greater the anxiety)