2020
DOI: 10.31234/osf.io/jm6xe
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Solutions to the problems of incremental validity testing in relationship science

Abstract: Incremental validity testing (i.e., testing whether a focal predictor is associated with an outcome above and beyond a covariate) is common (e.g., 57% of Personal Relationships articles in 2017), yet it is fraught with conceptual and statistical problems. First, researchers often use it to overemphasize the novelty or counterintuitiveness of findings, which hinders cumulative understanding. Second, incremental validity testing requires that the focal predictor and the covariate represent separate constructs; r… Show more

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Cited by 4 publications
(5 citation statements)
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“…But Wang and Eastwick (2020) described a third use of incremental validity testing, which may initially seem not to require causal theory, namely, the "isn't-it-just" argument. The isn't-it-just argument uses incremental validity to dispute a criticism that a new measure predicts only an outcome because it is a proxy for some already established predictor (e.g., "You found an effect of Machiavellianism on aggressive behavior, but isn't Machiavellianism just psychopathy?").…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…But Wang and Eastwick (2020) described a third use of incremental validity testing, which may initially seem not to require causal theory, namely, the "isn't-it-just" argument. The isn't-it-just argument uses incremental validity to dispute a criticism that a new measure predicts only an outcome because it is a proxy for some already established predictor (e.g., "You found an effect of Machiavellianism on aggressive behavior, but isn't Machiavellianism just psychopathy?").…”
Section: Discussionmentioning
confidence: 99%
“…Controlling for a variable that shares variance with the outcome but not the predictor will decrease the amount of residual variance in the outcome, which, in turn, lowers the standard error of the estimated regression coefficient and increases power (Cohen et al, 2003). Control variables are also sometimes used to establish that a new measure is uniquely predictive beyond some already established measure (Wang & Eastwick, 2020; we discuss this practice later in the paper). Researchers may also be interested in using the partial regression coefficients to describe partial associations rather than using them to explain psychological processes.…”
Section: Linear Regression and Statistical Controlmentioning
confidence: 99%
“…In other words, we planned to calibrate our confidence in our results based on both the extent to which focal p-values reached significance and on the extent to which similar patterns of effect sizes emerged across different analytic approaches. We decided to focus primarily on the effect sizes and p-values from the SEM approach because estimates from latent variable models tend to be more accurate (less biased) than those from observed variable approaches and because an SEM approach helps avoid type I error inflation in this multivariate context (Ledgerwood & Shrout, 2011;Wang & Eastwick, 2020). At the same time, any one estimate from SEM analyses using latent variables can be quite far from the true population parameter (Ledgerwood & Shrout, 2011), so looking for consistent patterns across multiple analytic approaches can be informative.…”
Section: Resultsmentioning
confidence: 99%
“…In the pilot study, we will first examine whether status anxiety differs from another organizational attitude, job insecurity, using confirmatory factor analyses. That is, evidence beyond a test of predictive validity (e.g., with each variable explaining unique variance in job satisfaction) would more strongly bolster our assertion that these constructs are separate (Clark and Watson, 1995;Flake et al, 2017;Wang and Eastwick, 2020). After, in our main study, we will test whether status anxiety relates to job satisfaction above and beyond the discussed relevant factors.…”
Section: Overview Of Present Researchmentioning
confidence: 88%