The Photo Elicitation Semantic Differential scale (PESD), developed to examine the social perception of disability and attitudes towards people with a disability (PwD), comprises six dimensions: communicativeness, competence, attractiveness, intelligence, industriousness, and popularity. This paper aims to assess the construct validity, test-retest reliability, and internal consistency of the PESD. A longitudinal study with 40 participants of the Swiss general population and 2 (test-retest) * 8 (different photographs) measurements per subject was performed. Construct validity was examined via Principal Component Analysis (PCA), test-retest reliability via the Intraclass Correlation Coefficient (ICC) and a frequency analysis of deviations among test-retest scores, and internal consistency via Cronbach's alpha. PCA extracted two factors corresponding to hard and soft skills for the test and a single factor for the retest. ICCs ranged from 0.44 (industriousness) to 0.60 (intelligence). Deviations between tests exceeding +/-1 were rather rare ranging from 6% (intelligence) to 14% (competence). Cronbach's alpha equalled 0.814 and 0.858 for test and retest, respectively. Summarising, in our study the PESD appears to be a valid