Familiar Sequences Are Processed Faster Than Unfamiliar Sequences, Even When They Do Not Match the Count-List.

Area of Science:

• Cognitive Psychology
• Human Memory and Processing

Background:

• Order processing typically favors consecutive sequences (e.g., 1-2-3) over nonconsecutive ones (e.g., 1-3-5), known as the reverse distance effect.
• This effect is often attributed to memory-based associative mechanisms, where familiar sequences are retrieved faster.
• However, the inconsistent presence of the reverse distance effect suggests familiarity might be a more nuanced factor.

Purpose of the Study:

• To investigate whether sequence familiarity, rather than mere consecutiveness, is the primary driver of processing speed.
• To test the hypothesis that familiar sequences are processed faster, irrespective of their consecutive or nonconsecutive nature.

Main Methods:

• A comparative judgment approach was employed to measure individual sequence familiarity in adults.
• Participants' processing speeds for various sequences were analyzed in relation to their measured familiarity levels.

Main Results:

• While not all participants exhibited the reverse distance effect, every participant demonstrated a familiarity effect.
• The familiarity effect was consistently stronger than the reverse distance effect across both group and individual analyses.
• This indicates that familiarity plays a more significant role in order processing than previously assumed.

Conclusions:

• The reverse distance effect may not be an independent phenomenon but rather a specific manifestation of a more general familiarity effect.
• Processing speed in order tasks is fundamentally influenced by sequence familiarity, which can override the advantage of consecutiveness.
• Future research should consider familiarity as a key variable when examining sequence processing.