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Related Experiment Videos

Informed consent: II. Withdrawal-without-prejudice clauses may increase no-shows.

A D Trice, B H Bailey

    The Journal of General Psychology
    |July 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Informing participants about the withdrawal-without-prejudice clause earlier in the recruitment process significantly increases no-show rates for study sessions. This timing impacts participant attendance but not test performance.

    Area of Science:

    • Psychology
    • Research Methodology
    • Participant Recruitment

    Background:

    • Understanding factors influencing participant recruitment and retention is crucial for research validity.
    • The timing of information disclosure, such as withdrawal clauses, may impact participant engagement.

    Purpose of the Study:

    • To investigate the effect of the timing of informing participants about the withdrawal-without-prejudice clause on study attendance.
    • To examine whether this timing influences participant persistence on a cognitive task.
    • To explore differences between no-shows and appointment keepers in locus of control and academic performance.

    Main Methods:

    • 132 undergraduate volunteers were randomly assigned to receive information about the withdrawal clause either at recruitment or immediately before testing.

    Related Experiment Videos

  • Study attendance rates were recorded.
  • Participant performance on a persistence-measuring test was assessed.
  • Locus of control and grade point averages were compared between attendees and no-shows.

    • Main Results:

    • A significantly higher no-show rate (50%) was observed when participants were informed of the withdrawal clause at recruitment compared to when informed just before testing (27%).
    • No significant difference in performance on the persistence test was found between the two groups.
    • No-shows exhibited a more external locus of control regarding academic matters and had lower grade point averages than appointment keepers.

    Conclusions:

    • The timing of disclosing the withdrawal-without-prejudice clause critically affects participant attendance in research studies.
    • Informing participants earlier about withdrawal rights can lead to decreased participation rates.
    • Participant characteristics, such as locus of control and academic achievement, are associated with appointment keeping.