To measure the severity of tinnitus. The survey consists of 25 questions ranked from 0 (did not interfere) to 10 (completely interfered). At least 19 of the 25 questions are required to be answered, and rankings are added together to give a maximum possible score of 250, which would be the most severe interference by tinnitus.

The inventory consists of 29 items in 3 subscales (Ability, the Adjustment and Participation Index) plus an additional 6 items that are not included in the MPAI-4 score. The first 29 scale items are intended to reflect the current status of the individual with brain injury without attempting to determine whether their status might be influenced by factors other than ABI (acquired brain injury). Items are scored from 0 to 4, with 0 being the most favorable score for each item, with a cumulative score ranging from 0 to 116 for all the items. A lower score indicates better adaptability.

The Symbol Search subtest of the Wechsler Adult Intelligence scale designed to assess information processing speed and visual perception with a minimum score of 0 as the lowest (worst performance) to 60 as the highest score (best performance).

The test has two batteries of subtests grouped into two general areas: 1) Verbal scales; and 2) Performance scales. The Verbal scales measure general knowledge, language, reasoning, and memory skills, while the Performance scales measure spatial, sequencing, and problem-solving skills.

The tests are administered to individual examinees by trained examiners, using a complex set of test materials. Testing requires approximately 90 minutes. Raw scores on each test are converted to standard scores with a mean of 10 and a standard deviation of 3. Scale scores in the Verbal battery are summed and converted to a Verbal Intelligence Quotient (IQ) score; the same is done for the Performance scale scores which yield the Performance IQ score. In turn, the Verbal and Performance IQ scores are summed and converted to obtain the Full Scale (overall) IQ score with a mean of 100 and a standard deviation of 15. Higher scores indicate a higher IQ.

To assess for improvements in measures of somatic symptoms related to TBI (headaches). The test is scored by adding points to 6 different categories related to frequency and severity of symptoms. The 6 category scores are summed to yield a total score ranging from 36 to 78. Fewer points signify less severity and higher point scores signify more severe symptoms according to patient assessment.

To assess for improvements in measures of somatic symptoms related to TBI (insomnia). The scoring consists of 19 items, the PSQI measures several different aspects of sleep, offering seven component scores and one composite score. The component scores consist of subjective sleep quality, sleep latency (i.e., how long it takes to fall asleep), sleep duration, habitual sleep efficiency (i.e., the percentage of time in bed that one is asleep), sleep disturbances, use of sleeping medication, and daytime dysfunction.

Each item is weighted on a 0-3 interval scale. The global PSQI score is then calculated by totaling the seven component scores, providing an overall score ranging from 0 to 21, where lower scores denote a healthier sleep quality.

Race and Ethnicity were not collected from any participant.

Region from which participants are enrolled

To measure the effect of CES use on trait and state anxiety. These scales comprise 20 items each and are scored on 4-point forced-choice response scales from 1 (seldom) to 4 (frequent). Scores range from 20 to 80, with higher scores suggesting greater levels of anxiety.The state and trait anxiety scales both range from 20 to 80 and are combined to yield a total score ranging from 40 to 160, where low scores suggest mild anxiety, median scores suggest moderate anxiety, and high scores suggest severe anxiety. Both scales include direct (presence of anxiety) and reverse-worded (absence of anxiety) items. Reverse-worded item scores are reverse scored and then totaled with the remaining items.

A 21 question set to assess subjects feelings in the last week. Each question has a set of at least 4 possible responses, ranging in intensity:

(0) I do not feel sad.

1. I feel sad.
2. I am sad all the time and I can't snap out of it.
3. I am so sad or unhappy that I can't stand it. When the test is scored, a value of 0 to 3 is assigned for each answer and then the total score ranging from 0 to 63 is compared to a key to determine the depression's severity. Higher total scores indicate more severe depressive symptoms.

To measure the severity of tinnitus. The survey consists of 25 questions ranked from 0 (did not interfere) to 10 (completely interfered). At least 19 of the 25 questions are required to be answered, and rankings are added together to give a maximum possible score of 250, which would be the most severe interference by tinnitus.

The inventory consists of 29 items in 3 subscales (Ability, the Adjustment and Participation Index) plus an additional 6 items that are not included in the MPAI-4 score. The first 29 scale items are intended to reflect the current status of the individual with brain injury without attempting to determine whether their status might be influenced by factors other than ABI (acquired brain injury). Items are scored from 0 to 4, with 0 being the most favorable score for each item, with a cumulative score ranging from 0 to 116 for all the items. A lower score indicates better adaptability.

The Symbol Search subtest of the Wechsler Adult Intelligence scale designed to assess information processing speed and visual perception with a minimum score of 0 as the lowest (worst performance) to 60 as the highest score (best performance).

The test has two batteries of subtests grouped into two general areas: 1) Verbal scales; and 2) Performance scales. The Verbal scales measure general knowledge, language, reasoning, and memory skills, while the Performance scales measure spatial, sequencing, and problem-solving skills.

The tests are administered to individual examinees by trained examiners, using a complex set of test materials. Testing requires approximately 90 minutes. Raw scores on each test are converted to standard scores with a mean of 10 and a standard deviation of 3. Scale scores in the Verbal battery are summed and converted to a Verbal Intelligence Quotient (IQ) score; the same is done for the Performance scale scores which yield the Performance IQ score. In turn, the Verbal and Performance IQ scores are summed and converted to obtain the Full Scale (overall) IQ score with a mean of 100 and a standard deviation of 15. Higher scores indicate a higher IQ.

To measure the effect of CES use on somatic symptoms related to TBI (Traumatic Brain Injury), including dizziness. The assessment scale rate 22 symptoms that may have disturbed subjects from 0 = no symptoms to 4 = very severe in the previous 2 weeks. The scores are summed to yield a total score ranging from 0 to 88, where the higher the point value, the greater the symptoms.

To assess for improvements in measures of somatic symptoms related to TBI (headaches). The test is scored by adding points to 6 different categories related to frequency and severity of symptoms. The 6 category scores are summed to yield a total score ranging from 36 to 78. Fewer points signify less severity and higher point scores signify more severe symptoms according to patient assessment.

To assess for improvements in measures of somatic symptoms related to TBI (insomnia). The scoring consists of 19 items, the PSQI measures several different aspects of sleep, offering seven component scores and one composite score. The component scores consist of subjective sleep quality, sleep latency (i.e., how long it takes to fall asleep), sleep duration, habitual sleep efficiency (i.e., the percentage of time in bed that one is asleep), sleep disturbances, use of sleeping medication, and daytime dysfunction.

Each item is weighted on a 0-3 interval scale. The global PSQI score is then calculated by totaling the seven component scores, providing an overall score ranging from 0 to 21, where lower scores denote a healthier sleep quality.