Witness self-efficacy: Development and validation of the construct

Robert J. Cramer, Tess M.S. Neal, Jamie DeCoster, Stanley L. Brodsky

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Despite the application of Self-Efficacy Theory (Bandura, 1977, 2000) to many areas of psychology, there is a lack of research on self-efficacy in the ability to testify in court. The present study fills this gap by incrementally developing the construct of Witness Self-Efficacy and establishing its psychometric properties. Study I features exploratory and confirmatory factor analyses yielding a two-factor Witness Self-Efficacy Scale (WSES). The two components are Poise and Communication Style. Study II uses a second data collection to show that both WSES domains possess convergent, divergent, and predictive validity relations consistent with those expected using an SET framework. Notably, WSES components predicted perceptions of witness credibility and sentencing outcomes above and beyond witness extraversion, general self-efficacy, and general self-confidence. Implications for SET and witness preparation training are discussed.

Original languageEnglish (US)
Pages (from-to)784-800
Number of pages17
JournalBehavioral Sciences and the Law
Issue number6
StatePublished - Nov 2010
Externally publishedYes

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health
  • Law


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