Fig 1.
Development and validation process of the stimulus set.
Fig 2.
Typical Developing Positive Expression Stimuli from Neutral (Left) over First Onset Frame (Middle) to Peak Frame (Right).
Fig 3.
Typical Developing Negative Expression Stimuli from Neutral (Left) over First Onset Frame (Middle) to Peak Frame (Right).
Table 1.
Undertaken edits in amount of frames removed or added.
Fig 4.
Experimental flow of study 1 and study 2.
Table 2.
Mean positive and negative affect score of the confederate during the video recording.
Table 3.
Mean removed and added frames for positive and negative expressions and the two elicitation methods.
Table 4.
Mean ratings and standard deviations of valence, intensity, genuineness and perceived edits for each expression.
Table 5.
One sample t-test statistics of valence ratings of positive and negative expression stimuli.
Fig 5.
Valence ratings for negative, neutral and positive expression stimuli.
Table 6.
Independent t-test statistics of valence ratings of neutral and positive and neutral and negative expression stimuli for each stimulus set.
Table 7.
Mann-Whitney U test statistics for comparing valence ratings of neutral and positive and neutral and negative stimuli.
Fig 6.
Intensity ratings of negative, neutral and positive expression stimuli in stimulus set 1 and stimulus set 2.