After a previous attempt to get answers here to what I found out was a nonsensical question I am looking for some good resources I can use to begin to understand the area.
The majority of Psychology experiment books in our library focus on statistics, data analysis, qualitative research methodologies and experiment design. But methods and techniques for determining sample size, with practical examples, seem to be few and far between, especially at a beginner level.
I have found a few books that I believe would be useful online but they are quite expensive and I would rather get feedback that they were worth the money and that there was nothing better out there.
- Sample Size Determination and Power - Thomas P. Ryan
- Sample Size Calculations: Practical Methods for Engineers and Scientists. Paul Mathews
So can anyone recommend books or other resources in the area, specifically for determining the sample size for hypothesis testing of the mean?
A brief overview of my research area: I am undertaking research to determine which particular features of a website or software interface affect a users perception using metrics such as trust, fairness, expertise etc. Each participant will rate 9 separate designs, each with a different distortion which I will then compare to the control. Participants will be crowdsourced online. Hope this helps.