Spatial coding of ordinal information in short- and long-term memory.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human-Computer Interaction

Background:

• Numerical information processing often leads to spatial response biases, such as the SNARC effect.
• A similar bias, the ordinal position effect, arises from temporary working memory associations.
• It was hypothesized that the SNARC effect is a form of the ordinal position effect, precluding their simultaneous occurrence.

Purpose of the Study:

• To investigate whether the SNARC effect and the ordinal position effect can occur simultaneously.
• To test the hypothesis that the SNARC effect is an instance of the ordinal position effect.
• To determine if spatial response biases can originate from distinct memory representations concurrently.

Main Methods:

• Two experiments were conducted to examine the interplay between the SNARC effect and the ordinal position effect.
• Participants performed tasks designed to elicit both spatial numerical and spatial ordinal biases.
• Behavioral data, specifically response times and accuracy, were analyzed to identify the presence and interaction of these effects.

Main Results:

• The SNARC effect and the ordinal position effect were demonstrated to be not mutually exclusive.
• Evidence suggests that both effects can be observed concurrently within the same experimental paradigms.
• The findings challenge the notion that the SNARC effect is solely an instance of the ordinal position effect.

Conclusions:

• Spatial response biases can arise from the simultaneous activation of different representational systems.
• Both pre-existing long-term memory representations and temporary working memory associations contribute to spatial biases.
• The SNARC effect and the ordinal position effect likely stem from distinct underlying cognitive mechanisms.