Anyone know how to draw out a conclusion for this one? There are 3 levels of significance so I'm confused!
I did this some time, but I can't find the answers.
Anyway, pretty sure it means that the difference between A and B is not significant, the difference between B and C is not significant, but the difference between A and C is significant.
ie. No conclusions can be made about the difference between learning with no background noise than with some background noise, and no conclusions can be made about the difference between learning with some background noise than with loud background noise, but conclusions can be made about the difference between learning with no background noise than with loud background noise (recall is better with no noise).
Sorry that got kinda wordy and messy, but I hope you understand
That's fine! You're life saviour
On the other note, is this repeated measures design? What are some weaknesses of the experimental design in this experiment?
It is repeated measures, and I think you could talk about that as a weakness. The participants may have developed strategies for easier recall (practice effect). The fact that they knew what all the conditions were means they were probably able to guess what the hypothesis was, and hence may try to fulfil it or even go against it. A matched participants study design would be better. This would also allow for the same list of 40 words to be used, eliminating the chance of some words having greater meaning to the participants, and hence being easier to remember.
Another weakness is non-standardised delivery of instructions, as different assistants were used for each trial. Differences in tone, volume or speed could make a difference in how easily the lists could be learned.
You could also mention the fact that it is verbal noise, meaning it would be significantly more distracting if you could understand what was being said, so this would have affect if the conversation was loud enough to understand in trial C but not in trial C. This could be minimised by using meaningless noise instead.