Cited by 933Cognitive Abilities and TestingNeural and Behavioral Psychology StudiesCognitive Functions and Memory

Working memory, attention control, and the N-back task: a question of construct validity

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Kane, Michael J., Conway, Andrew R. A., Miura, Timothy K., Colflesh, Gregory J. H.·2007·Journal of Experimental Psychology: Learning, Memory, and Cognition

Abstract

The N-back task requires participants to decide whether each stimulus in a sequence matches the one that appeared n items ago. Although N-back has become a standard "executive" working memory (WM) measure in cognitive neuroscience, it has been subjected to few behavioral tests of construct validity. A combined experimental- correlational study tested the attention-control demands of verbal 2- and 3-back tasks by presenting n = 1 "lure" foils. Lures elicited more false alarms than control foils in both 2- and 3-back tasks, and lures caused more misses to targets that immediately followed them compared with control targets, but only in 3-back tasks. N-back thus challenges control over familiarity-based responding. Participants also completed a verbal WM span task (operation span task) and a marker test of general fluid intelligence (Gf; Ravens Advanced Progressive Matrices Test; J. C. Raven, J. E. Raven, & J. H. Court, 1998). N-back and WM span correlated weakly, suggesting they do not reflect primarily a single construct; moreover, both accounted for independent variance in Gf. N-back has face validity as a WM task, but it does not demonstrate convergent validity with at least 1 established WM measure.

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Crossref · 10.1037/0278-7393.33.3.615

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  • Stimuli presentation was pseudo-randomized to avoid the occurrence of lure trials.

    “Stimuli presentation was pseudo-randomized to avoid the occurrence of lure trials (i.e., non-target letters that match a recent letter in the sequence but not the letter N-back), which are known to elicit more false alarms (FA) and misses than non-lure non-targets because of their familiarity and resemblance to targets (see Kane et al., 2007).”

    From Working Memory Reloaded: Tyrosine Repletes Updating in the N-Back Task (2013) · cites this paper as Kane et al., 2007

    The N-Back Task Design section defines lure foils as recent-letter matches that are not n-back matches, and the Univariate Analyses of N-Back section reports more false alarms for lures than for control foils. It reports more misses for targets immediately following lures than for control targets in 3-back, not more misses on lure trials than on non-lure non-target trials. The citing authors’ pseudo-randomization is their own procedure, not a procedure attributed to Kane et al. (LLM, conf=0.88)

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  • Both maintenance and disengagement matter for problem-solving, but their relative contribution could explain the different relations of complex span and n-back with fluid intelligence and their less-than-perfect correlation.

    “Both maintenance and disengagement are important for problem-solving (e.g., Carpenter et al., 1990), but the relative contribution of each could be driving the different relationships of complex span tests and the n-back with fluid intelligence, as well as their less-than-perfect correlation with each other (e.g., Kane et al., 2007).”

    From Which “working memory” are we talking about? Complex span tasks versus N-back (2025) · cites this paper as Kane et al., 2007

    The Discussion (page unavailable in our copy) reports that n-back and complex span shared only 2%–5% of their variance and predicted largely independent variance in fluid intelligence. This supports their weak correlation and different relationships with intelligence. The paper does not attribute those differences specifically to the relative contributions of maintenance and disengagement; it instead discusses differences in retrieval and recognition demands. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • WM is an umbrella term encompassing diverse experimental paradigms, from maintenance of perceptual, spatial or verbal information to complex "n-back" and "span" tasks, with uncertain construct validity.

    “WM is itself an umbrella term encompassing diverse experimental paradigms, from maintenance of perceptual, spatial or verbal information to complex “n-back” and “span” tasks, with uncertain construct validity (Kane, Conway, Miura, & Colflesh, 2007; Shallice & Cooper, 2011).”

    From Strategic offloading of delayed intentions into the external environment (2015) · cites this paper as Kane, Conway, Miura, & Colflesh, 2007

    The Abstract and Discussion report that n-back and working-memory span tasks correlate weakly, raising questions about whether they measure the same construct; the Article specifically questions n-back’s construct validity. The paper does not establish the broader description of working memory as an umbrella covering perceptual, spatial, and verbal maintenance paradigms, and it describes span tasks as extensively validated rather than casting equal doubt on both tasks. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • The 2-back condition requires on-line monitoring and updating of working memory content, which is cognitively demanding.

    “In conditions with n = 2 or higher (where the match is for the stimulus that appeared two or more items ago), this task requires the on-line monitoring and updating of WM content, which is known to be cognitively demanding (Kane et al., 2007).”

    From Working Memory Reloaded: Tyrosine Repletes Updating in the N-Back Task (2013) · cites this paper as Kane et al., 2007

  • N-back is an updating task that shows a substantial correlation with higher-level cognitive measures, including Matrix Reasoning.

    “One of the most common tasks used in these WM training studies is the N-back, an updating task that correlates significantly with measures of higher-level cognition, such as Matrix Reasoning20–24.”

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Cites

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Research works printed but not linked: 2

  1. [3]3. Baddeley, A. D. (1986). Working memory. London: Oxford University Press.
  2. [34]34. Raven, J. C., Raven, J. E., & Court, J. H. (1998). Progressive matrices. Oxford, England: Oxford Psychologists Press.

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Authors
Kane, M. J., Conway, A. R. A., Miura, T. K., & Colflesh, G. J. H.
Affiliations
  • University of North Carolina at Greensboro (US)
  • Princeton University (US)
  • University of Illinois Chicago (US)
Venue
Journal of Experimental Psychology: Learning, Memory, and Cognition
Published
2007-05
Volume
33
Issue
3
Pages
615-622
ISSN
  • 0278-7393 (ISSN-L)
  • 1939-1285
OpenAlex
W1978600950
Cited by
933
References
40
Citations by year
2026: 50 · 2025: 68 · 2024: 73 · 2023: 49 · 2022: 61 · 2021: 74 · 2020: 70 · 2019: 67 · 2018: 63 · 2017: 57 · 2016: 50 · 2015: 57 · 2014: 49 · 2013: 34 · 2012: 32
FWCI
21.75
Type
journal article
Language
en
Open access
Locations
  • Journal of Experimental Psychology Learning Memory and Cognition (publishedVersion)
  • PubMed (publishedVersion)
  • NC Digital Online Collection of Knowledge and Scholarship (The University of North Carolina at Greensboro) (submittedVersion)
Funders
Air Force Office of Scientific Research (F49620-00-1-131)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Functions and Memory
Keywords
n-back task, working memory, attentional control, construct validity, convergent validity, operation span, fluid intelligence, executive function
MeSH terms
Attention, Humans, Individuality, Intelligence, Memory, Short-Term, Pattern Recognition, Visual, Problem Solving, Psychomotor Performance, Reaction Time, Semantics, Serial Learning, Verbal Learning

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