MEC 325 Lecture Notes - Lecture 9: Content Validity, Face Validity, Anthropometry

• School: Ryerson University
• Department: Mechanical Engineering
• Course: MEC 325
• Professor: Fil Salustri

Document Summary

Evaluation tests effect of system on humans. Subjective: any data collection approach based on the human sensory system. Objective: any data collection approach based on instruments/machines. This is a question of the form of the data. Quantitative: data is based on numbers. Qualitative: data is based on words or other modality (like brightness or colour) / obj. ) can yield quant. or qual. data. All have something at stake in eng design. Anthropometry of user group: measurements and proportions of the human body. Double-barrelled question: two questions at once. 5-point scales: 5 words ranging from good to bad / high to low. 7-point scale: 7 words ranging from good to bad / high to low. Psychophysical scales: the number scale is anchored by text. 0 to 10 scales: 0 1 2 3 4 5 6 7 8 9 10. Sensitivity: face validity looks good, content validity has all relevant aspects, construct validity related to theoretical concept.