Careless Responding: Why Many Findings Are Spurious or Spuriously Inflated

Author:

Stosic Morgan D.1ORCID,Murphy Brett A.2ORCID,Duong Fred3ORCID,Fultz Amber A.4,Harvey Summer E.5,Bernieri Frank4

Affiliation:

1. Department of Psychology, University of Maine, Orono, Maine

2. Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina

3. Department of Psychology, University of Toronto, Toronto, Ontario, Canada

4. School of Psychological Science, Oregon State University, Corvallis, Oregon

5. Department of Psychology, Northeastern University, Boston, Massachusetts

Abstract

Contrary to long-standing conventional wisdom, failing to exclude data from carelessly responding participants on questionnaires or behavioral tasks will frequently result in false-positive or spuriously inflated findings. Despite prior publications demonstrating this disturbing statistical confound, it continues to be widely underappreciated by most psychologists, including highly experienced journal editors. In this article, we aim to comprehensively explain and demonstrate the severity and widespread prevalence of careless responding’s (CR) inflationary effects in psychological research. We first describe when and why one can expect to observe the inflationary effect of unremoved CR data in a manner accessible to early graduate or advanced undergraduate students. To this end, we provide an online simulator tool and instructional videos for use in classrooms. We then illustrate realistic magnitudes of the severity of unremoved CR data by presenting novel reanalyses of data sets from three high-profile articles: We found that many of their published effects would have been meaningfully, sometimes dramatically, inflated if they had not rigorously screened out CR data. To demonstrate the frequency with which researchers fail to adequately screen for CR, we then conduct a systematic review of CR screening procedures in studies using paid online samples (e.g., MTurk) published across two prominent psychological-science journals. These findings suggest that most researchers either did not conduct any kind of CR screening or conducted only bare minimal screening. To help researchers avoid publishing spuriously inflated findings, we summarize best practices to help mitigate the threats of CR data.

Publisher

SAGE Publications

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