Multitasking induced contextual blindness

Cooper, JM; Strayer, David L. · 2025 · Human Factors

DOI: 10.1177/00187208241274040

archive: archived pipeline: cataloged verified

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Summary

This study investigates "multitasking-induced contextual blindness," a phenomenon where performing a secondary task impairs the ability to use environmental cues to guide attention and anticipate events. The research addresses how dual-task scenarios suppress and mask the learning of temporal and spatial sequences, extending theoretical understanding beyond simple response delays to include deficits in memory-driven performance. The authors posit that secondary tasks may not only hinder the acquisition of sequence knowledge but also prevent access to already learned information, leading to failures in identifying task-relevant information even when visually attended. The researchers conducted three experiments using a uniform within-subjects design involving single-task and dual-task conditions, practice sets, and transfer sets. Experiment 1 utilized a serial reaction time task to examine temporal sequence learning, where participants responded to targets in repeated or novel locations while optionally performing a tone-counting secondary task. Experiment 2 employed a contextual cueing task to assess spatial sequence learning, requiring participants to identify targets amidst distractors in repeated or novel spatial layouts. Experiment 3 integrated these concepts into a simulated driving task to evaluate ecological validity. Across all experiments, performance was measured via response time facilitation (the difference in reaction times between repeated and novel sequences) and explicit memory recognition using signal detection metrics. Results from Experiment 1 demonstrated that multitasking both suppressed and masked learning. Participants showed significant response time facilitation during single-task practice but not during dual-task practice. Crucially, when participants who practiced in a dual-task condition transferred to a single-task condition, they exhibited facilitation, indicating that learning had occurred but was masked by the secondary task. Conversely, those who practiced in single-task conditions and transferred to dual-task conditions showed no facilitation, suggesting the secondary task masked access to previously learned sequences. Explicit memory tests confirmed that participants could recognize repeated sequences regardless of task condition, though response biases varied. The abstract notes that similar patterns of suppression and masking were observed in the spatial cueing and driving simulation experiments, indicating that secondary tasks consistently impair the accrual and expression of sequence knowledge. The findings conclude that secondary tasks significantly suppress and mask sequence learning in complex tasks, resulting in contextual blindness. This impairment limits an operator's ability to use environmental regularities to guide attention and predict future events. The study highlights implications for skill acquisition and performance in high-stakes domains such as driving, aviation, and manufacturing, where the inability to leverage contextual cues due to multitasking can lead to critical safety failures. The research supports the hypothesis that multitasking interferes with both the encoding of new sequence information and the retrieval of established knowledge, rather than merely causing response delays.

Key finding

Secondary-task performance suppresses the accrual of temporal and spatial sequence learning across all three paradigms and additionally masks the expression of learning in the serial reaction time task (Exp 1) and the simulated driving task (Exp 3); contextual cueing (Exp 2) showed suppression but no masking. The driving simulator showed a crossover pattern: facilitation for repeated context was largest in single-task practice with single-task transfer and smallest under dual-task conditions, supporting H1 (multitasking both suppresses and masks learning) for ecologically valid driving.

Methodology

mixed_methods

Sample size: Exp 1: N=36 (18M/18F, mean age 21.2); Exp 2: N=36; Exp 3: N=36 (17M/19F, mean age 24.9)

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 2026-05-27 (5 acquisition events logged).

Summary generated by qwen3.6-27b-nvidia on 2026-08-10; verification: verified.

Topics

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

• dual task performance
• dual task multitasking
• inattentional change blindness
• temporal
• visual manual
• task switching

Information type

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• Empirical Findings: behavioral performance data
• Methodological Resource: measurement protocol
• Theoretical Contribution: theory or model