Explicit Instructions Increase Cognitive Costs of Deception in Predictable Social Context

Area of Science:

• Cognitive Psychology
• Social Psychology
• Neuroscience

Background:

• Deception research often lacks social context, relying on explicit instructions.
• Explicit instructions typically lead to increased cognitive load for deceptive responses.
• Social context is known to activate prior knowledge, facilitating behavior.

Purpose of the Study:

• To investigate if social context reduces cognitive load during deception.
• To test if prior knowledge, activated by social context, negates the need for explicit instructions.
• To examine the influence of explicit vs. implicit cues on cognitive load in deception.

Main Methods:

• Developed a Speed-Dating Task (SDT) simulating social interaction.
• Participants responded honestly and deceptively to appear similar to predictable date categories.
• Compared reaction times (RTs) under explicit instructions (external cues) vs. prior knowledge adaptation (internal cues).

Main Results:

• Internal cues (prior knowledge) yielded similar RTs for honest and deceptive responses.
• External cues (explicit instructions) resulted in longer RTs for deceptive responses, indicating higher cognitive load.
• Deception costs were higher with external cues, particularly early in the experiment.

Conclusions:

• Social context can influence cognitive processes in deception.
• Explicit instructions may impose a cognitive load not present when relying on social context and prior knowledge.
• The findings partially support the hypothesis that social context can mitigate deception-related cognitive load.