The CSAT-Online or CSAT-2 is a new computerised attentional task based on CSAT (Children Sustained Attention Task) that run on internet. Unfortunately, we still don’t have the instructions in english, but the next information could be useful and, of course, you will be able to contact with us (see contact-form below).

THE CSAT (Servera, M. & Llabrés, J. (2004). CSAT: Tarea de Atención Sostenida en el niño (manual y CD-Rom). Madrid: TEAediciones (link).

CSAT (and CSAT-II also) is a test to assess sustained attention in children.

Sustained attention (SA) has been shown to be related to several mental disorders. In children, SA has been studied in attention-deficit/hyperactivity disorders (ADHD) and in learning disabilities (LD). From a theoretical point of view, SA can be studied departing from two different paradigms: continuous performance tests (CPT) and vigilance tasks(VT). In CPTs the subject is required to continuously respond to some stimuli appearing on a screen except when the target appears, whereas in VTs the subject is presented with several stimuli and is required to ask only when the target appears on the screen. The CSAT is a task based on the vigilance model, and may thus be considered a complementary measure of sustained attention to Conners’ CPT-II or similars.

The CSAT consisted of 600 stimuli (numbers from 0 to 9), approximately 3.5 cm (1.38 in.) in size, which appeared on the computer one at a time screen for approximately 250 ms, and their inter-stimulus interval was 500 ms.. The target was double: 6-3 (30% of event rate). The task take approximately 7 min. and 30 sec, and was normalized in a spanish sample. The CSAT provide automatically raw scores, percentiles and T-Scores for hits (correct responses), reaction time, commission errors, and d’, C and A’ indices (based on the Signal Detection Theory).

– Servera, M., & Cardo, E. (2006). Children Sustained Attention Task (CSAT): Normative, reliabilitiy, and validity data. International Journal of Clinical and Health Psychology, 6 (3), 697-707 (download)


Note: For the present time the instructions are in catalan and spanish

The CSAT-2 have a similar structure but with a lot of changes. For example, now we can use a preeschool version (CSAT-P) that works with figurative stimulus. The CSAT-II is not limited to 11 years (it is from 6 to 99 years old). Now the task is formed by sequences of aproximately 3 minuts. You can select from 1 to 5 sequences depends on the age of the subject. Each sequence present the same characteristics:

  • Stimulus: numbers on screen, from 0 to 9. Total: 240 stimulus.
  • Stimuli duration on screen = 250 miliseconds.
  • Target = “3” followed by “6”.
  • Response: press space bar when the target is on screen.
  • Interstimulus Interval (ISI)= 500 miliseconds
  • Target percentage = 30%
  • Hits: 6-3 (max. 36)
  • Commision Errors:
  1. Perseveratives: 6 – #: (max. 28)
  2. Distractions: # -3: (max. 28)
  3. Impulsives: # – 6: (max 64)
  4. Randoms: # – # (max. 84)

For example, for children from 6 to 10 years you can select two sequences, from 11 to 14 three sequences, from 15 to 17 four sequences, and from 18 years the five sequences.

But you can not only select the number of sequences but also the possibiltity to assess with “feedback”. If you select the “scoreboard”, the subject will see his or her results on the screen according to his or her performance (on real time).

At this moment we don’t have normative data, and you just will see the measures of hits, reaction time and errors. But perhaps you can help us to collect data… If you are interested in the CSAT-II project, and would like more information… please fill these contact-form (name, profession, company, university or institution and email is required). We would be very pleased to attend you.

%d bloggers like this: