It is well-established that selection decisions can be improved using multiple non-redundant assessments. Two such assessments are cognitive ability and conscientiousness. Though meta-analytic findings demonstrate little or no relationship between cognitive ability and conscientiousness, faking research suggests the two variables are related when test-takers are motivated to fake. We extend this logic by showing that incremental validity for conscientiousness declines when respondents fake, due to enhanced collinearity between conscientiousness and cognitive ability. Three studies, employing within-subjects designs and utilizing three different faking conditions, reveal a consistent increase in collinearity between conscientiousness and cognitive ability when respondents are motivated to fake, leading to reduced incremental validity of conscientiousness beyond cognitive ability in predicting the performance. Implications for selection systems are discussed.

中文翻译：

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造假对认知能力和责任心之间关系的影响：警告

众所周知，可以使用多个非冗余评估来改进选择决策。两个这样的评估是认知能力和责任心。尽管元分析结果表明认知能力和尽责性之间几乎没有关系，但造假研究表明，当考生有造假动机时，这两个变量是相关的。我们扩展了这一逻辑，表明由于责任心和认知能力之间的共线性增强，当受访者作假时，责任心的增量效度会下降。三项研究，采用受试者内部设计并利用三种不同的造假条件，揭示了当受访者有动机造假时，责任心和认知能力之间的共线性持续增加，导致责任心的增量有效性降低，超出了预测绩效的认知能力。讨论了对选择系统的影响。