Initial training with difficult items does not facilitate category learning.

Area of Science:

• Cognitive psychology
• Animal behavior
• Learning science

Background:

• Transfer along a continuum (TAC) describes how initial training on simple tasks improves subsequent learning of complex tasks.
• TAC is a robust, cross-species phenomenon supported by associative learning theories.
• A recent study reported an opposite effect, suggesting initial training on difficult items aids learning, challenging existing theories and proposing a dual-system model (COVIS).

Purpose of the Study:

• To investigate the validity of the reported opposite transfer effect.
• To determine if the counterintuitive finding is a genuine phenomenon or an artifact.
• To re-evaluate the evidence base for the COVIS model and the universality of TAC.

Main Methods:

• Four experiments were conducted to rigorously test the reported opposite transfer effect.
• Methodologies likely involved discrimination learning tasks with varying item difficulty.
• Statistical analyses were employed to assess the reliability and significance of the findings.

Main Results:

• Substantial evidence was found indicating the opposite transfer effect was an error.
• The results suggest the prior finding was a false positive.
• No support was found for the facilitation of learning by initial training on hard items.

Conclusions:

• The pervasive transfer along a continuum (TAC) phenomenon remains robust and well-supported.
• The reported opposite transfer effect is not considered a valid counter-example to TAC.
• The findings do not support the COVIS dual-system model as an explanation for this purported effect.