Author(s) This pre-registration is currently anonymous to enable blind peer-review. It has 2 authors.
Pre-registered on 06/23/2019 10:57 AM (PT)
1) Have any data been collected for this study already? No, no data have been collected for this study yet.
2) What's the main question being asked or hypothesis being tested in this study? We hypothesize that as children grow older, they are more likely to see a connection between following group conventions and being a better cooperator.
3) Describe the key dependent variable(s) specifying how they will be measured. Children’s responses in selecting the high-conformity or low-conformity model when asked a series of questions about who will be more likely to share who they give attributions of positive and negative behaviors, who they expect to be included by the group, and the child’s overall preferences.
4) How many and which conditions will participants be assigned to? There are no conditions, but video order and model will be counterbalanced.
5) Specify exactly which analyses you will conduct to examine the main question/hypothesis. Our hypothesis-driven test will be a GLMM with subject ID as random effect, age and trial as predictor and the binary choice of high vs low conformity model as binary outcome. We will also run the same regression controlling for video order, model, and sex as preliminary analyses. In addition, we will test whether separately by age groups whether the responses deviate significantly from 0.50.
6) Describe exactly how outliers will be defined and handled, and your precise rule(s) for excluding observations. Children will be excluded from data analyses if they: (a) failed to sit through the entire procedure, (b) were identified by their parents as having potential difficulties making sense of social situations or show other developmental delays, (c) parental interference, or (d) experimenter error.
7) How many observations will be collected or what will determine sample size? No need to justify decision, but be precise about exactly how the number will be determined. We will stop data collection after we have collected usable data from a sample of 80 children (n = 16 per age group, 5-9 years old). There’s no precedent for this line of work to conduct proper power analyses, therefore we used a conventional sample size that is sufficient to detect a medium effect size.
8) Anything else you would like to pre-register? (e.g., secondary analyses, variables collected for exploratory purposes, unusual analyses planned?) No
