Effects of Neurofeedback Training on Attentional Deficits in Patients With Acquired Brain Injury

The Conners Continuous Performance Test (CCPT ) is a computer administered test designed to assess problems with attention. It presents 360 stimuli trials (i.e., individual letters) on the screen, with 1, 2, or 4 seconds intervals between the presentation. The 360 trials are divided into 18 blocks of 20 trials each and participants instructed to press the spacebar or the appropriate key on the mouse for any letter that appears, except the letter "X." The CCPT takes 14 minutes to administer. Through the various measures of the CCPT we can measure different aspects of attentional deficits such as processing speed, sustained and selective attention, inhibition, vigilance, inattention.

The Color Trail Test evaluates processing speed, selective attention, sequencing, mental flexibility, visual search, and motor function. It has been used for detecting cognitive impairment in early stages and a wide variety of neurological processes and disorders. In Part A of the test, the subject is presented with a sheet with numbers from 1 to 25 placed inside circles and distributed randomly across an A4-sized sheet. The task involves connecting the numbers consecutively and in ascending order as quickly as possible. In Part B of the test, the 25 numbers are duplicated inside circles of two different colors, a sequence of pink and another of yellow. In this part, the subject must connect the consecutive numbers while alternating the color of the circles.

The Spatial Span test relies on visuospatial working memory. It is a variation of the Corsi block tapping task a widely used tool in clinical neuropsychology to assess non-verbal memory deficits. The original task involves irregularly arranged mounted wooden blocks, and the examiner taps out a sequence that the patient is required to mimic. The digit span test is a very short test that evaluates a person's cognitive status that initially was part of Wechsler's Intelligence Scale. It consists of telling the participant a series of numbers and ask him to repeat them back to you in the same order you say them. The first series are composed of three numbers, the next series four numbers, then five etc. The series are repeated until one incorrect answer is observed. Both the digit and spatial span tests are frequently used in hospitals and physicians' offices in order for a clinician to quickly evaluate whether a person's cognitive abilities are normal or impaired

The online d2-R is the computerized version of the d2 Test of Attention - Revised. The test measures the ability to concentrate and sustain attention. It consists of picking out target symbols, from among similar symbols, under pressure of time. The participant is asked to search for and mark certain target symbols (ie., the letter "d" with two dashes). The test itself consists of 14 screens in succession, each having 60 symbols laid out in six rows of ten. All instances of "d" with two dashes are to be marked. The instruction is to work quickly, without making mistakes.

EEG analyses are based on the recording of EEG signal, which is the sum of neuronal activity, mainly post-synaptic, represented on a time axis. Based on EEG we will be able to perform analyses on qEEG, connectivity between regions. We will use BrainVision system for EEG recording of 15 minutes of resting state.

The P300 is a component of an event-related potential (ERP), which is a measurable brain response to a specific stimulus. It typically occurs around 300 milliseconds after the presentation of a stimulus that is unexpected, infrequent, or relevant. It is often used in cognitive neuroscience to study attention and decision-making processes. It is detected using EEG and often uses tasks like the "oddball paradigm," where subjects are asked to detect infrequent target stimuli among frequent non-targets, to elicit the P300 response.

P300 will be assessed with an auditory oddball paradigm built using Eprime and Brain Vision EEG system.

The Intrinsic Motivation Inventory (IMI) is a multidimensional measurement device intended to assess participants' subjective experience related to a target activity in laboratory experiments. It is composed of several subscales that measure enjoyment, perceived competence, effort, value, felt pressure, perceived choice. The interest/enjoyment subscale is the self-report measure of intrinsic motivation. Although research has showed that the order in which the subscales are presented is negligible, all subscales are rarely administered and researchers generally choose the subscales relevant to their study. In the present study we will administer the items related to the interest/enjoyment subscale.

The Patient's Global Impression of Change is a short questionnaire composed of two questions about the patient's perception of change related to his/her symptoms. One question is rated 1 to 7 (Likert scale) and the other one is rated 0 to 10.

The Moss Attentional Scale was developed by Whyte and Hart to provide a reliable, quantitative and ecologically valid measure of attention-related behaviors. It is composed of 22 items, each being a descriptor rated on a five-point Likert-type scale according to how well that behavior describes the patient, ranging from "definitely true" to "definitely false."

The Goal Attaintment Scale (GAS) was first introduced in the 1960s by Kirusek and Sherman for assessing outcomes in mental health settings. It is a method of scoring the extent to which patients' individual goals are achieved in the course of intervention. Traditional standardised measures include a standard set of tasks (items) each rated on a standard level. In GAS, tasks are individually identified to suit the patient, and the levels are individually set around their current and expected levels of performance.