Negative Priming Experiment

Negative priming is the slowing observed when a stimulus that was just ignored becomes the target on a later display (Tipper, 1985). This experiment measures it with an ignored-repetition letter task: judge the red letter on each display while ignoring the white letters.

Theoretical Background

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Priming

Priming refers to the influence of a previously encountered stimulus on the processing of a later one. Prior exposure can speed responses (positive priming) or slow them (negative priming), depending on whether the stimulus was responded to or ignored.

  • Positive priming: responding to a stimulus facilitates its later processing.
  • Negative priming: ignoring a stimulus as a distractor slows later responses to that same stimulus.
  • Both effects are measured as reaction-time differences between controlled conditions, not as single absolute scores.

Negative Priming

Negative priming is observed when a previously ignored stimulus (a distractor) reappears as the target: responses to it are typically slower — and sometimes less accurate — than responses to stimuli that were not recently present.

  • It is a benchmark phenomenon for selective attention: ignored information is actively processed, not simply filtered out.
  • Competing accounts describe it as temporary inhibition of distractor responses or as episodic retrieval of 'do-not-respond' tags; the debate is unresolved.
  • It has been studied in relation to aging, schizophrenia, and attention deficits — as research indices, not as diagnostic tools.
Further Reading

References

  • Tipper, S. P. (1985). The negative priming effect: Inhibitory priming by ignored objects. Quarterly Journal of Experimental Psychology, 37A(4), 571-590. 10.1080/14640748508400920
  • Dalrymple-Alford, E.C. & Budayr, B. (1966). Examination of some aspects of the Stroop color word test. Perceptual & Motor Skills, 23, 1211-1214.
  • Frings, C., Schneider, K.K., and Fox, E. (2015). The negative priming paradigm: An update and implications for selective attention. Psychonomic Bulletin & Review, 22(6), 1577-1597.
  • Mayr, S. & Buchner, A. (2007). Negative Priming as a Memory Phenomenon. Journal of Psychology, 215(1), 35-51.

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Frequently Asked Questions

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What is negative priming?

When a stimulus you just ignored becomes the target on a later display, responses to it slow down — Tipper's classic demonstration that ignored stimuli are actively processed and suppressed, not passively filtered out.

How is the effect measured in this task?

Each trial shows two letter grids. On some probes the red target letter was one of the white, to-be-ignored letters on the previous grid (ignored repetition); on control probes it is brand new. The effect is the reaction-time difference between these two probe types.

Why judge vowels and consonants?

The vowel/consonant judgment forces you to attend to the red letter and actively ignore the white ones. That ignoring step is exactly what makes the ignored-repetition manipulation meaningful.

What does a larger effect mean?

Under the inhibition account, stronger suppression of ignored information; under the retrieval account, stronger 'do-not-respond' memories. The two accounts are still debated, and a single session is only a rough, descriptive look at your own data.

About This Experiment

This experiment is an educational adaptation for demonstration purposes. It is not a clinical diagnostic tool. Results reflect your performance in this specific session and should not be interpreted as an assessment of your cognitive abilities.

Data Privacy

Your experiment data is processed and stored locally in your browser. No data is uploaded to any server unless you explicitly export it.

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