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When is a failure to replicate not a type II error?

Marco Vasconcelos¹, Peter J Urcuioli, Karen M Lionello-DeNolf

¹Department of Psychological Sciences, Purdue University, 703 Third Street, West Lafayette, IN 47907, USA. marcov@psych.purdue.edu

Journal of the Experimental Analysis of Behavior

|June 20, 2007

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The work-ethic effect in pigeons may be a statistical anomaly, not a reliable finding. Further research is needed to confirm its existence and understand overtraining

Area of Science:

Animal behavior
Behavioral psychology
Comparative cognition

Background:

The work-ethic effect, initially reported by Clement et al. (2000), suggests a phenomenon in pigeons.
Zentall and Singer (2007) contested the conclusion that this effect might be a Type I error.

Purpose of the Study:

To re-evaluate the validity of the work-ethic effect in pigeons.
To address criticisms regarding the original study's methodology and replication status.

Main Methods:

Review of existing literature on the work-ethic effect.
Analysis of replication attempts and criticisms regarding overtraining levels.

Main Results:

The original work-ethic effect has not been reliably replicated despite multiple attempts.

Related Experiment Videos

Criticisms suggesting insufficient overtraining in the original study indirectly support the unreliability of the effect.

Conclusions:

The conclusion that the work-ethic effect may be a Type I error remains warranted.
The reliability of the work-ethic effect is questionable due to lack of consistent replication.