Adherence by Music to Exercise in Dementia: Group Therapy (AMUSED)

The OERS evaluates the positive (pleasure, interest/alertness) and negative mood (anger, anxiety, sadness) by observing the extent or duration of facial expressions and body movements and has a moderate to high interrater reliability. To evaluate the OERS, two exercise sessions will be recorded each month and results will be averaged to compensate for daily fluctuations.

The timed chair stand test is a valid and reliable test to evaluate muscle strength in older adults. The participant will be asked to stand up and sit back down on a chair five times without using their hands. The time it takes to perform this task will be measured.

When using the hand-held dynamometer to measure strength, the break technique will be used. The examiner will apply resistance in a fixed position and the person being tested exerts a maximum effort against the dynamometer for 3-5 seconds. At the last second, the examiner applies a resistance sufficient to overcome the maximum effort of the person being tested and cause the subject's joint to move.

Compliance will be measured by assessing whether the participants exercised at the prescribed intensity. To evaluate compliance, two exercises sessions will be recorded and results will be averaged to compensate for daily fluctuations. Both quality and quantity of the participants' performances will be scored. To measure the quantity, the amount of repetitions the participant performed will be rated from zero (no repetitions) to three (all repetitions). A score of two was chosen as cut-off score, indicating that more than half of the exercises were performed. To measure quality, the recorded performances will be compared with the visual instructions on the TV-screen and will be scored on a scale from zero (no repetitions) to three (the performance matched completely with the instructions). A score of two was chosen as cut-off score, indicating that more than half of the exercises were matched with the instructions.

Adherence will be measured by counting the amount of therapy sessions each participant completed (%)

The amount of participants that discontinued the program

The Tinetti test was developed to assess gait and balance in older adults and to assess perception of balance and stability during activities of daily living and fear of falling. It's also used as an indicator of the fall risk of an individual. During the test, the participant will be asked to perform certain tasks. The examiner will look at certain key points to score these tasks.

The actigraph is a validated, 3 axis accelerometer that will be used to measure activity level (inactivity/sedentary behavior as well as general restlessness and wandering behavior) and sleep. The device will be worn for five consecutive days. During the day, the actigraph will be worn at the hip to measure activity and during the night, the actigraph will be worn at the wrist to measure sleep.

The MoCA is a tool used to determine if cognitive impairment is present. It takes around ten minutes to complete. It evaluates visuospatial skills, attention, language, abstract reasoning, delayed recall, executive function, and orientation.

The ICECAP-O questionnaire is validated self-report measure for quality of life in older adults with mild and moderate dementia. The ICECAP-O focuses on a broader sense of wellbeing, rather than only health related quality of life. The measure covers attributes of wellbeing that were found to be important to older adults.

The CMAI-D is a 29-item scale to assess agitation. The participants are rated by the staff of the nursing home regarding the frequency with which, over the past two weeks, they manifested agitated behaviors. Each item is rated on a 7-point scale ranging from "Never" to "Several times per hour".