- US Students (N = 335)
- US Working Population (N = 410)
- German Students (N = 1267)
- German Working Population (N = 166)
Internal consistency reliability: Total Achievement Motivation displays a high level of reliability (.96). 14 scales show adequate reliability (>.70).
Test-retest reliability: 14 scales exceed .80 and several approach .90.
Standard error of measurement is approximately 4.00. 68% chance that the scores will be within a range of 4 points above to 4 points below the person's true score.
Content validity is described in the technical manual.
Intercorrelations between the AMI scales show a median correlation of .35.
Construct validity comparing the AMI with the NEO PI-R show correlations between several scales and Conscientiousness. Compensatory Effort (.52), Engagement (.56), Persistence (.55) and Self Control (.72). Neuroticism is negatively correlated to Confidence in Success (-.46), Fearlessness (-.56) Flexibility (-.43) and Persistence (-.50). Other correlations shown are Competitiveness and Agreeableness (-.40), Dominance and Extraversion (.46), Eagerness to Learn and Openness to Experience (.41).