PEEYA

Validation: Rating on Typicality:

The photographic sets of nine posers (i.e., 63 photographs in total) were tested for its validaity. An additional photograph set of emotional expressions of a middle-age Chinese from another published study (Wang et al., 2006) was regarded as a comparing group in this validating exercise.  

Twenty-one undergraduates (14 females and 7 males), age ranging from 18 to 22, were recruited as raters who were required to rate the magnitude of each emotional expression which were shown on a 15” screen randomly. A fixation appeared for one second at the beginning of each trail, and a photograph was then presented. Six questions regarding the typicality of the emotions were shown randomly below each photograph, and the raters were asked to response in score from 1 to 7 to indicate the magnitude of the emotional expression, with 7 representing the strongest emotion. A new trial then begun after all six keystroke responses were received. All keystroke responses were recorded by software DirectRT. 

Results: Four sets of emotional expressions from four posers were eventually selected. The typicality scores of all the expressions of each of these four posers are generally above 4 in a 7-point rating scale.   

 

Validation: Rating on Valence and Arousal:

Another thirty raters (twenty females and ten males, age ranging from 18-22) were recruited to evaluate the strength of 

valence and arousal dimensions of the selected four sets mentioned above. The 28 photographs of the emotional expressions from the 4 posers were randomly shown, and two questions regarding the valence and arousal of the emotions were shown below each photograph. Raters were required to response in a 7-point scale, whereas 1 means Inactive/Unpleasant and 

7 means Active/Pleasant.

Results: A table of scores is shown as below.