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It is a match! Timely response to a specific target boosts concurrent task processing.

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The attentional boost effect (ABE) enhances memory during multitasking. This study shows that the speed of making target and response decisions, not just the decisions themselves, influences this memory enhancement.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Multitasking often causes cognitive interference.
  • The attentional boost effect (ABE) paradoxically improves memory for concurrent stimuli when attention is directed to a demanding target.
  • Previous theories link ABE to norepinephrine release from the locus coeruleus during target classification.

Purpose of the Study:

  • To investigate if target classification and response decisions are all-or-none processes influencing the ABE.
  • To determine if the processes leading up to these decisions modulate the ABE.
  • To examine the role of decision-making speed in the ABE and temporal orienting response.

Main Methods:

  • Participants performed a continuous memory encoding task while monitoring a letter stream.
  • Target identification involved either exact search (specific letter) or category search (group of letters).
  • Response timing was manipulated: immediate response or delayed response to the target.

Main Results:

  • Memory benefits were reduced in category search compared to exact search.
  • Delayed responses led to less memory benefit than immediate responses.
  • These effects occurred despite successful target identification and response in all conditions.

Conclusions:

  • Target and response decisions do not operate in an all-or-none fashion regarding the ABE.
  • The attentional boost effect and temporal orienting response are sensitive to the speed of perceptual and response decision-making.
  • Decision-making speed is a critical factor modulating memory enhancement during attentionally demanding tasks.