What is a Navon task?
The Navon task (Navon, 1977) is a well-known letter identification task in which large letters constructed from a number of much smaller letters are presented as stimuli; participants respond to either the large or small letters while ignoring the other type.
What is the Navon paradigm?
To examine this, Navon developed a now classical paradigm, which involved the presentation of compound stimuli; a large letter (global level) composed of smaller letters (local level) in which the global and the local letters could be the same (consistent) or different (inconsistent).
How is the Navon task scored?
Navon task interference scores (calculated as the difference in RT between congruent and incongruent conditions) for Low and High trait Anxiety groups, in the A) global task (local interference), and B) local task (global interference).
What can be affected by reading Navon figures?
It has been shown that just 5 minutes reading out the small letters of Navon figures has a detrimental effect on face recognition. The size of the Navon effect has been found to be influenced by the properties of the image. The effect is short lived (lasting less than a couple of minutes).
Why is Navon task important?
In selective attention Navon tasks, congruency effects can modulate responses. Faster response time (RT) and higher accuracy are observed when the stimuli at global and local levels are identical (congruent trials) than when the levels include inconsistent information (incongruent or neutral trials).
Who invented Navon task?
This specific implementation is designed by PsyToolkit developer Gijsbert Stoet. There are 50 trials. On each trial, you get up to 4 seconds to decide whether you see a target letter (H or O) at the local or global level, or not. On each trial, you need to respond with a key press.
Is the Navon task reliable?
Importantly, while the face task and both versions of the hierarchical shape task showed moderate-to-high test–retest reliability, the standard Navon letter task showed fairly poor reliability in both studies.
What is the independent variable in Navon task?
2.4 Design The independent variable was the nature of the Navon task (global or local) prior to the wine recognition test. This was a within-participants variable. The dependent variable was whether the participant correctly recognised the target wine in the recognition test.
What is the kimchi Palmer task?
To measure this attentional scope, Kimchi and Palmer (1982) developed a task where individuals make similarity judgements. In this task, three global figures (large triangles or squares) each comprised of local elements (small triangles or squares) are presented.
What or who is the Navon task named after?
David Navon’s paper about the speed with which people process global and local information is extremely popular (Navon, 1977).