'Aesthetics in Biological Motion - Emotion'
(AsPredicted #44125)
Created: 07/06/2020 05:02 PM (PT)
This is an anonymized version of the pre-registration. It was created by the author(s) to use during peer-review.
A non-anonymized version (containing author names) should be made available by the authors when the work it supports is made public.
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? This experiment has two purposes: (1) to explore the aesthetic experience from viewing people walking, and (2) to test the relationship between visual aesthetics in body movements and perceived emotion of the same movements.
3) Describe the key dependent variable(s) specifying how they will be measured. In the first block, observers will view a series of point-light walkers of different genders and identities in different emotions, and they will be asked to report on a 6-point scale how visually pleasing they find the videos to be. In the second block, observers will rate the same videos on how positive of a mood the walker appears to be in. Our dependent measure will be both kinds of ratings.
4) How many and which conditions will participants be assigned to? All conditions are within-subject. The videos will be of 20 walkers (10 females, 10 males) in 4 different emotional states (neutral, happy, angry, sad). The trial order will be completely randomized in each block for each subject. Each video will be randomly chosen to be horizontally mirrored or not for each subject (the same orientation will be shown in the two blocks for each subject).
5) Specify exactly which analyses you will conduct to examine the main question/hypothesis. 1. We will z-transform ratings within each block for each participant.
2. For each participant, we will correlate their individual rating of each video to the mean rating of the same video across the rest of the participants, separately for aesthetic ratings and emotion ratings, yielding what we call typicality scores. We will also calculate the average inter-subject correlation for both ratings separately.
3. We will look at main effect of emotions on aesthetic ratings.
4. We will look at by-item correlation between emotion ratings and aesthetic ratings.
6) Describe exactly how outliers will be defined and handled, and your precise rule(s) for excluding observations. We will exclude (a) observers who answered the instruction test question incorrectly more than once; (b) observers who had browser viewports smaller than 800 x 600 px; (c) observers who took less than 0.5 second to read any page of instructions except for the last page (consider only the longer time between repeats); (d) observers who completed any trial without the stimuli fully in view; (e) observers who gave the same ratings for more than 15 consecutive trials; (f) observers who was recorded to switch windows or tabs more than three time during the blocks; (f) observers who had more than 4 trials in either block with RT longer than 120 s; (g) observers who took longer than 2 SD from mean experiment duration of the whole sample to complete the experiment; (h) observers who reported not following instructions or did not follow the instructions (e.g., produced patterned ratings); (i) observers who encountered technical problems; and (j) observers who failed to answer questions sensibly. These observers will be replaced until our target sample size is reached.
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 collect data from 50 subjects (post-exclusions).
8) Anything else you would like to pre-register?
(e.g., secondary analyses, variables collected for exploratory purposes, unusual analyses planned?) No
