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A Continuous Performance Task/Test, or CPT, is a psychological test which measures a person's sustained and selective attention. Sustained attention is the ability to maintain a consistent focus on some continuous activity or stimuli, and is associated with impulsivity. Selective attention is the ability to focus on relevant stimuli and ignore competing stimuli. This skill is associated with distractibility.[1]

There are a variety of CPTs, the more commonly used being the Conner's CPT-II and the Test of Variables of Attention (TOVA). These attention tests are often used as part of a battery of tests to understand a person's 'executive functioning' or their capacity to sort and manage information. They may also be used specifically to support a diagnosis of Attention Deficit Disorder

Test Administration

Although the tests may vary in terms of length and type of stimulus used, the basic nature of the tests remain the same. The client is told that they will see a series of letters presented on a screen. They are told to click a button (or computer mouse) only when they see the "target" stimulus, for instance the letter "X." The person must refrain from clicking if they see any other letter presented. To increase the difficulty, some tests change the task so that the person must only click if they see the letter "A" before the letter "X."[1]

Other tests may use numbers, symbols, or even sounds, but the basic task has the same concept. The TOVA is similar but is administered on a separate device rather than a computer screen. It uses geometric shapes rather than letters so that reading levels do not play a part in the scoring. The TOVA also differs in that is has two sections. The first section is a "low brain stimulation task" where the targets are infrequently presented. The boring nature of this task pulls for "errors of omission" when the person is distracted and not responding to the target. The second half of this test is a "high brain stimulation task" in which targets are frequently presented. This task pulls for "errors of commission" since a person may expect to see a target and impulsively respond.[2]

Test Scoring

While scoring varies from test to test, there are three main scores that are used.

Reaction times This measures the amount of time between the presentation of the stimulus and the client's response.

Omission errors This indicates the number of times the target was presented, but the client did not respond/click the mouse. High omission rates indicate that the subject is either not paying attention (distractibility) to stimuli or has a sluggish response.

Commission errors This score indicates the number of times the client responded but no target was presented. A fast reaction time and high commission error rate points to difficulties with impulsivity. A slow reaction time with high commission and omission errors, indicates inattention in general.

These client's scores are compared with the normative scores for the age, group and gender of the person being tested.[1]

See also

References

  1. 1.0 1.1 1.2 Conners, C.K. & MHS Staff. (Eds.) (2000) Conners’ Continuous Performance Test II: Computer Program for Windows Technical Guide and Software Manual. North Tonwanda, NY: Mutli-Health Systems.
  2. Introducing the Test of Variables of Attention (T.O.V.A.™). The Tova Company. URL accessed on 2008-03-22.
Attention
Aspects of attention
Absent-mindedness | Attentional control | Attention span | Attentional shift | Attention management | Attentional blink | Attentional bias | Attention economy | Attention and emotion | Attention optimization | Change blindness | Concentration |Dichotic listening | Directed attention fatigue | Distraction | Distractibility | Divided attention | Hyperfocus | Inattentional blindness | Mindfulness |Mind-wandering | Meditation | Salience | Selective attention | Selective inattention | Signal detection theory | Sustained attention | Vigilance | Visual search |
Developmental aspects of attention
centration | [[]] |
Neuroanatomy of attention
Attention versus memory in prefrontal cortex | Default mode network | Dorsal attention network | Medial geniculate nucleus | | Neural mechanisms | Ventral attention network | Intraparietal sulcus |
Neurochemistry of attention
Glutamatergic system  | [[]] |
Attention in clinical settings
ADHD | ADHD contoversy | ADD | AADD | Attention and aging | Attention restoration theory | Attention seeking | Attention training | Centering | Distractability | Hypervigilance | Hyperprosexia | Cognitive-shifting | Mindfulness-based Cognitive Therapy |
Attention in educational settings
Concentration |
Assessing attention
Benton | Continuous Performance Task | TOMM | Wechsler Memory Scale |
Treating attention problems
CBT | Psychotherapy |
Prominant workers in attention
Baddeley | Broadbent | [[]] | Treisman | Cave |
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