---
title: "Continuous Performance Test (CPT) | Cognitive Psychology"
description: "Continuous Performance Test (CPT) measures sustained attention and response control in Cognitive Psychology, often to spot ADHD-related attention problems."
canonical: "https://fiveable.me/cognitive-psychology/key-terms/continuous-performance-test-cpt"
type: "key-term"
subject: "Cognitive Psychology"
unit: "Unit 19"
---

# Continuous Performance Test (CPT) | Cognitive Psychology

## Definition

A Continuous Performance Test (CPT) is a cognitive psychology task that measures sustained attention and response control by asking you to respond to target stimuli and ignore distractors over time.

## What It Is

A Continuous Performance Test (CPT) is a task in Cognitive Psychology that checks how well someone can keep attention steady and control responses over time. You usually see it as a computer-based activity where a person watches a long stream of letters, shapes, sounds, or images and presses a button only for certain targets.

The point is not just whether you can spot the right item once. The test is designed to see what happens when attention has to stay active for minutes at a time. That makes CPTs useful for studying sustained attention, impulsive responding, and lapses in focus. If someone presses when they should not, that is often called a commission error. If they miss a target, that is an omission error.

CPTs come in different versions, but the basic logic stays the same: keep the task simple, repeat it for long enough, and measure how performance changes. Researchers may look at reaction time, missed targets, false alarms, and whether the person gets slower or less accurate as the task goes on. A person who starts strong but fades over time may be showing a drop in sustained attention, not a lack of understanding.

In Cognitive Psychology, that makes the CPT a window into executive control, especially the ability to maintain a goal and suppress distractions. It is often discussed alongside attention problems in ADHD, but the test itself does not diagnose anything by itself. A weak score can reflect many things, including fatigue, anxiety, low motivation, poor sleep, medication effects, or broader executive function issues.

A good way to think about a CPT is that it tests a very narrow but revealing skill: can you hold a rule in mind and keep following it even when the task gets boring? That makes it especially useful in research on attention because it separates brief alertness from stable, ongoing control.

## Why It Matters

CPTs matter in Cognitive Psychology because they give you a concrete way to measure attention instead of just talking about it in theory. Attention is easy to describe in class, but harder to pin down in a person’s behavior. A CPT turns that abstract idea into numbers you can analyze, like reaction time, omission errors, and commission errors.

This term also shows up in topics on attention and executive function disorders, especially ADHD. If a case description says someone is distractible, impulsive, or loses focus over time, a CPT may be part of the assessment picture. The test helps researchers and clinicians separate “I was distracted for a moment” from a pattern of ongoing difficulty with sustained attention and inhibition.

It also connects to bigger course questions about what attention really is. A person can know the instructions, understand the task, and still perform poorly because the problem is in maintaining control over time. That distinction matters when you are explaining behavior in experiments, clinical cases, or class discussion.

You can also use CPT results to compare groups or track change over time. For example, if a treatment or intervention improves performance, the test may show fewer missed targets or fewer false alarms. That makes CPTs useful in both research and applied settings.

## Connections

### [Sustained Attention](/cognitive-psychology/key-terms/sustained-attention)

A CPT is one of the clearest ways to measure sustained attention because it requires you to stay alert across a long, repetitive task. If performance drops as the task continues, that can show attention fatigue or lapses in vigilance. In class, this connection helps you separate brief focus from the ability to maintain focus over time.

### Executive Function

CPTs do more than measure basic noticing. They also tap executive function, especially keeping a rule active and stopping the wrong response. That is why the test is useful when a course is discussing self-control, monitoring, and goal maintenance. Poor CPT performance can reflect problems in executive control, not just attention alone.

### Attention Deficit Hyperactivity Disorder (ADHD)

CPTs are often discussed in relation to ADHD because people with ADHD may show more omissions, more commission errors, or more variable reaction times. The test can support a broader assessment, but it does not confirm ADHD on its own. That distinction matters, since many other factors can also affect CPT performance.

### [Inhibition Control Deficits](/cognitive-psychology/key-terms/inhibition-control-deficits)

A common CPT error is responding when you should not, which points to weak inhibitory control. That makes the task useful when you are studying impulse control and response suppression. If a scenario shows lots of false alarms, the CPT result may suggest trouble stopping a prepotent response.

## On the AP Exam

A quiz question may give you a short case and ask what a CPT would measure, so you would identify sustained attention and response inhibition. If the prompt describes many missed targets, you would connect that pattern to omissions and possible attention lapses. If it describes frequent button presses to non-targets, you would link that to commission errors and weak inhibition.

In a short answer or essay, use CPT data as evidence, not as a diagnosis by itself. You might explain that the person can perform the task instructions but still show declining accuracy across time, which suggests difficulty maintaining attention. If the course is covering ADHD, you can mention that CPTs are often used as part of a larger assessment, alongside interviews, rating scales, and other measures.

If your teacher gives you a graph or test report, look for speed, accuracy, and how performance changes across the session. The best answers name the metric and explain what cognitive process it reflects, instead of just restating that the person “did badly.”

## Continuous Performance Test (CPT) vs Wisconsin Card Sorting Test

A CPT and the Wisconsin Card Sorting Test both look at executive function, but they measure different skills. A CPT focuses on sustained attention and response control over repeated trials, while the Wisconsin Card Sorting Test is about shifting strategies when the rules change. If a prompt is about staying alert and avoiding false alarms, think CPT. If it is about changing rules and cognitive flexibility, think WCST.

## Key Takeaways

- A Continuous Performance Test is a computer-based task that measures how well you can stay attentive and avoid incorrect responses over time.
- In Cognitive Psychology, CPTs are used to study sustained attention, response inhibition, and patterns of errors like omissions and commissions.
- CPT results can point to attention or executive function problems, but they do not diagnose a disorder by themselves.
- The test is especially useful in discussions of ADHD because it captures focus, impulse control, and how performance changes during a long task.
- When you see CPT data, pay attention to accuracy, reaction time, and whether attention drops as the task continues.

## FAQs

### What is a Continuous Performance Test (CPT) in Cognitive Psychology?

A Continuous Performance Test is a task that measures sustained attention and response control by making you react to target stimuli while ignoring others over time. In Cognitive Psychology, it is used to study how attention holds up during repetitive, boring, or demanding conditions. The pattern of mistakes can reveal lapses in focus or inhibition.

### What does a CPT measure besides attention?

A CPT also measures response inhibition, reaction time, and how consistently someone can maintain a rule across many trials. That is why it shows up in executive function topics, not just attention. Frequent false alarms point to impulse control problems, while missed targets point more toward lapses in sustained attention.

### Is a CPT the same as an ADHD test?

No. CPTs are often used when ADHD is being considered, but they are not a stand-alone ADHD diagnosis. A weak CPT score can happen for other reasons too, including fatigue, anxiety, low motivation, or sleep loss. Clinicians usually combine it with interviews, history, and other measures.

### How do you interpret errors on a Continuous Performance Test?

Omission errors mean the person missed a target they should have responded to, which can suggest attention lapses. Commission errors mean they responded when they should have withheld the response, which can suggest poor inhibition. Looking at both error types gives a fuller picture than accuracy alone.

## Related Study Guides

- [19.2 Attention and Executive Function Disorders](/cognitive-psychology/unit-19/attention-executive-function-disorders/study-guide/uGVV4IAQ6EoupmeP)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
- [MCP server for AP teachers](https://fiveable.me/mcp/teachers): a teacher's classes, assignments and AP-rubric grading (`https://fiveable.me/api/mcp/teacher`)

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