Incidental visual memory for targets and distractors in visual search

Williams, Carrick C.; Henderson, John M.; Zacks, f · 2005 · OpenAlex-citations

DOI: 10.3758/bf03193535

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 the extent to which detailed visual information is retained incidentally during visual search tasks, addressing a debate in cognitive psychology regarding whether scene perception relies on stored visual details or continuous online processing. While previous research demonstrated that intentional memorization leads to robust retention of visual details, it remained unclear if incidental encoding during search—where participants are not instructed to remember items—produces similar memory traces. The authors specifically examined whether memory for search targets and distractors varies based on their relationship to the target and the allocation of attention. The experimental design involved 24 participants performing a conjunction search task where they counted targets defined by a specific color-category combination (e.g., a white telephone) within arrays of 12 real-world object photographs. Each array contained targets, related distractors (sharing either the target’s color or category), and unrelated distractors. Crucially, every object token was unique and appeared only once per participant to isolate memory for specific items. Following the search, participants completed a difficult two-alternative forced-choice token discrimination test, requiring them to identify the exact object seen during search from a visually similar foil, thereby minimizing reliance on semantic knowledge. Eye movements were recorded throughout the search to correlate attentional deployment with memory performance. The results indicated that participants retained significant visual details of objects despite having no instruction to memorize them. Memory performance was significantly above chance for all object types, but varied by object category. Targets were remembered best, followed by related distractors (color and category), which were remembered better than unrelated distractors. Eye-tracking data revealed that this memory gradient corresponded directly to attentional allocation: objects that were remembered better were fixated more frequently and for longer durations during the search. Specifically, related distractors attracted more fixations than unrelated ones, and targets were viewed on nearly every trial. Furthermore, memory for targets improved when objects were viewed twice compared to once, highlighting the role of repeated processing. These findings provide strong evidence that visual search generates incidental, detailed memory traces for both targets and attended distractors. The study concludes that the visual representation of an object persists after it is no longer in view, containing sufficient detail to support fine-grained discrimination. This challenges theories suggesting that little visual memory is retained during search, demonstrating instead that attentional engagement during search naturally encodes detailed visual information, with the strength of this encoding determined by the object’s relevance to the search goal and the amount of visual processing it receives.

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.

Summary generated by qwen3.6-27b-prismaquant on 2026-06-25; verification: verified.

Topics

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

• visual search
• inattentional change blindness