Positive forgetting of sentence material.

Area of Science:

• Cognitive Psychology
• Memory Research

Background:

• The positive-forgetting phenomenon describes how cues to forget information can paradoxically improve memory for other items.
• Previous research, notably by Bjork (1970, 1972), explored this phenomenon primarily with individual items.

Purpose of the Study:

• To investigate the positive-forgetting phenomenon using sentence material.
• To determine the influence of sentence connectedness and interest on the magnitude of this effect.
• To extend existing theoretical interpretations to more complex linguistic stimuli.

Main Methods:

• Participants were presented with sets of sentences, each cued as either "remember" or "forget."
• Recall accuracy was measured for to-be-remembered (TBR), to-be-forgotten (TBF), and uncued control sentences.
• A recognition test assessed the availability of keywords from TBF and TBR sentences.

Main Results:

• To-be-remembered sentences showed significantly higher accessibility than to-be-forgotten and control sentences.
• Sentence connectedness was a significant factor in the recall phenomenon's magnitude.
• Differential sentence interest did not significantly impact the observed effects.
• Recognition tests revealed equal availability of key phrases from both TBR and TBF sentences.

Conclusions:

• The findings support extending Bjork's selective-rehearsal and differential-grouping models to explain positive forgetting with sentence material.
• The results have implications for understanding information acquisition from single presentations.
• Memory cues can selectively enhance or suppress recall for complex linguistic information.