Reaction behaviour training is provided as part of the Attention group of RehaCom training modules. As such it can be used with clients with severe cognitive deficits affecting reaction speed.
Reduced reaction speed (e.g. as a result of brain insult - ischemia dementia, craniocerebral trauma, tumor development, etc.) mostly occurs with diffuse brain damage as well as in frontal and prefrontal lesions.
This training module is suitable for persons aged 6 and up. The training task is to press the corresponding reaction button as fast as possible whenever a relevant stimulus - a traffic sign - is shown on the screen.
Each task has 2 phases:
the preparation phase, and the reaction training phase.
During the preparation phase, the client makes him-/herself familiar with the task
The client has to memorise traffic signs and the corresponding reaction buttons. The patient has to memorise which key has to be pressed in relation to the stimulus being presented. The irrelevant stimuli, which may be used later in the training, are not shown. The patient ends the preparatory phase by pressing the OK key.
During the training phase, relevant traffic signs are presented to the client who must react within a certain time interval. In higher difficulty levels, irrelevant traffic signs, which require no reaction from the client can be shown if desired. After the appearance of a traffic sign, the key on the RehaCom keyboard assigned to the stimulus has to be pressed as quickly as possible. To minimize the strain on the patient’s memory, the key/stimulus combinations are visible on the right-hand side of the screen. The patient should not react to irrelevant stimuli (those not learned in the preparation phase). Acoustic and/or visual feedback is provided when an incorrect decision is made. The task ends when the number of stimuli determined by the training parameters was shown.
There are three types of errors which can be made:
- reaction too late (Reaction time > maximum reaction time),
- no reaction to a relevant stimulus and
- incorrect reaction (incorrect key pressed in reaction to a relevant stimulus or pressing a key in reaction to an irrelevant stimulus).
When acoustic feedback is enabled in the Parameter menu, an acoustic signal can be heard after each incorrect decision.
The type of signal for each type of error is different. The visual feedback changes the background color (from green to red) momentarily. There is no visual feedback for correct decisions.
Reactions that happen after the maximum reaction time are dealt with as incorrect decisions. In order to avoid irritation, acoustic and visual feedback can be disabled. At the end of each task, the patient is told how many errors theymade (if any) and if the reaction time speed needs to be altered.Whether the patient should proceed to the next level is also given.
This module has 16 levels of difficulty
The module works in an adaptive way as in all the RehaCom training modules. The levels of difficulty are organised around the following criteria:
- Utilisation of 3 types of tasks,
- Use of simple, choice and multiple-choice reaction, central and peripheral (distributed randomly throughout the training field) processing of signals and
- Use of relevant and irrelevant signals
For more detailed information n this training module you can view the PDF of the module manual