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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
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What matters in making demand-based decisions: Time alone or difficulty too?

Markus Janczyk1, Iman Feghhi2, David A Rosenbaum2

  • 1Department of Psychology, University of Bremen, Bremen, Germany. janczyk@uni-bremen.de.

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Participants chose between cognitive arithmetic tasks and physical bucket-carrying tasks. They preferred the bucket task when it was empty, and when cognitive tasks became harder or longer, indicating a unified difficulty perception.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Human-computer interaction

Background:

  • Comparing task difficulty is crucial for understanding decision-making and effort allocation.
  • Previous research often focuses on single-modality task difficulty, lacking a unified framework for cognitive and physical tasks.

Purpose of the Study:

  • To investigate how individuals compare the difficulty of cognitive (arithmetic) and physical (bucket carrying) tasks.
  • To identify factors influencing the choice between cognitive and physical exertion.
  • To explore the possibility of a common metric for perceived task difficulty.

Main Methods:

  • Two experiments were conducted where participants chose between performing cognitive tasks for a set duration or a physical task involving carrying a weighted bucket.
  • Cognitive tasks varied in problem type (addition/multiplication) and duration.
  • Physical tasks involved carrying buckets of varying weights over a fixed distance.

Main Results:

  • Participants were more likely to choose the bucket task when it was empty compared to when it was weighted.
  • The probability of choosing the bucket task increased as the cognitive task became more difficult or its duration extended.
  • Choice probabilities could be modeled using a single abstract variable, Φ, suggesting a unified representation of difficulty.

Conclusions:

  • Perceived difficulty is not strictly modality-specific and can be compared across cognitive and physical tasks.
  • An abstract variable (Φ) may represent a common code for subjective difficulty, potentially related to inferred effort or subjective duration.
  • Further research is needed to determine the precise nature of this abstract difficulty variable.