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Table 5 Response criterion in the pre-test and final post-test sessions

From: Perceptual learning in the identification of lung cancer in chest radiographs

Image format Training status Pre-test Final post-test Statistical results (ANOVA)
Intact (N = 60) Untrained −0.29 −0.17 No change in criterion. No main effects or interaction, ps > .24.
Trained −0.24 −0.13
Small cutout (N = 60) Untrained 0.65 0.25 An initial bias toward “normal” was reduced (p < .002). No other effects (ps > .16)
Trained 0.69 0.35
Large cutout (N = 12) Untrained 0.30 0.28 No change in criterion. No main effects or interaction, ps > .25
Trained 0.40 0.19
Background (N = 48) Untrained 0.09 0.09 No change for untrained images. Response became more liberal for trained images (p < .04) Significant interaction p < .001
Trained 0.16 −0.09
  1. Positive values indicate a bias in reporting “normal”. Negative values indicate a bias in reporting “abnormal”. ANOVA analysis of variance