The decay of perceptual representations in iconic memory

Iconic decay in schizophrenia.

Working memory impairment is considered a core deficit in schizophrenia, but the precise nature of this deficit has not been determined. Multiple lines of evidence implicate deficits at the encoding stage. During encoding, information is held in a precategorical sensory store termed iconic memory, a literal image of the stimulus with high capacity but rapid decay. Pathologically increased iconi...

Number of Memory Representations in Perceptual Concepts

Three reaction time (RT) experiments using a modified Sternberg procedure were conducted to determine the number of memory representations maintained for perceptual (dot-pattern) concepts. The difference in RT to test stimuli from memory sets of different sizes was used to infer whether one, or more than one, memory representation was utilized for the perceptual concepts. It was concluded that ...

The comparison of visual working memory representations with perceptual inputs.

The human visual system can notice differences between memories of previous visual inputs and perceptions of new visual inputs, but the comparison process that detects these differences has not been well characterized. In this study, the authors tested the hypothesis that differences between the memory of a stimulus array and the perception of a new array are detected in a manner that is analog...

Structural Learning from Iconic Representations

Iconic Representations and Representative Practices