Integrated responding improves prospective memory accuracy

Elliott, David; Strickland, Luke; Loft, Shayne; Heathcote, Andrew · 2021 · Psychonomic Bulletin & Review

DOI: 10.3758/s13423-021-02038-0

archive: archived pipeline: cataloged verified

Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)

Summary

This study investigates a novel response method designed to improve prospective memory (PM) accuracy, which is critical for safety-critical domains like aviation and healthcare. PM involves remembering to perform future actions, and failures (misses) are common when PM responses compete with routine ongoing tasks. The authors propose "obligatory responding," where participants simultaneously classify both the ongoing task (word vs. non-word) and the PM status (present vs. absent) using a four-choice response on every trial. This contrasts with the standard "replacement" method, where a PM response replaces the ongoing response, and "dual" methods, which introduce timing confounds. The goal was to determine if integrating these responses reduces PM misses by strengthening cue-action associations or promoting task integration. The experiment involved 36 participants performing a lexical decision task with embedded PM cues (specific stimulus colors) across two sessions. Each session included blocks of obligatory and replacement conditions, with counterbalanced key mappings. Participants responded as quickly and accurately as possible. Data were analyzed using mixed-effects models to assess accuracy and response times (RTs), and Conditional Accuracy Functions (CAFs) to examine the speed of errors. The design allowed for a direct comparison of PM performance without the inter-trial interval confounds present in previous dual-task studies. Results indicated that while PM accuracy was similar in the first session, the obligatory method yielded significantly fewer PM misses in the second session compared to the replacement method. Specifically, the obligatory PM miss rate dropped to approximately 6%, less than half the rate observed in the replacement condition. This improvement was not merely due to slower responding; although obligatory responses were initially slower, RTs decreased substantially with practice. CAF analysis revealed distinct error patterns: obligatory responding was characterized by fast PM errors, whereas replacement responding produced slower errors. Lexical decision accuracy remained high across conditions, though obligatory responses were slower, consistent with Hick’s Law. The findings suggest that obligatory responding improves PM accuracy through practice-dependent mechanisms, likely by fostering integration between the ongoing and PM tasks or strengthening cue-response associations via implicit rehearsal. The predominance of fast errors in the obligatory condition implies that strategic slowing could further enhance performance, offering a potential avenue for improving PM in high-stakes environments. The study highlights that integrating PM and ongoing responses into a single, simultaneous action can mitigate the competition that typically leads to PM failures, provided sufficient practice is allowed for task integration.

Key finding

Obligatory responding significantly reduces prospective memory misses compared to replacement responding after practice, with errors characterized by faster response times.

Methodology

lab_experiment

Sample size: 36

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via author_sweep_intake on 2026-05-28.

Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• prospective memory interruptions