Harackiewcz et al., 2016: Affirming values had no benefits among first-generation students probably because there were no social class gap
Tibbetts, Y., Harackiewicz, J. M., Canning, E. A., & Boston, J. S. (2016). Attitudes and Social Cognition: Affirming independence: Exploring mechanisms underlying a values affirmation intervention for first-generation students. Journal of Personality and Social Psychology, 110(5), 635-659.Download PDF
An attempted replication of the values-affirmation in Harackiewcz et al., 2014 did not produce the same gains in achievement, possibly because there was not a significant achievement gap along social class lines in this sample.