Modification of Threat Interpretation Bias to Reduce Anxiety in Neurodegenerative Movement Disorders (Aim 3)

Movement Disorders Interpretation Bias Scale (MDIB)

Movement Disorders Interpretation Bias Scale (MDIB) is a measure of interpretation bias in people with movement disorders. Participants rate the likelihood (0-4) of three alternate explanations (two benign and one negative) for why an ambiguous event occurred. To obtain negative external and internal bias scores, the mean of 5 negative ratings for external threats (Items 3c, 5a, 7a, 10a, 11c) and the mean of 4 negative ratings for internal threats (Items 1b, 4c, 8b, 12b) will be computed, where higher scores (possible range: 0-4) reflect more severe negative interpretation biases.

Time frame: From baseline to end of week 6

Parkinson Anxiety Scale (PAS)

The Parkinson Anxiety Scale (PAS) total score will be used as a secondary measure of patient-reported anxiety symptoms. PAS includes 12 self-report items that make up three subscales (persistent and episodic anxiety and avoidant behavior). Items are ranked 0-4 with a maximum total score of 48, where higher scores indicate worse anxiety symptoms.

Time frame: From baseline to end of week 6

Brief Body Sensations Interpretation Questionnaire (BBSIQ)

Brief Body Sensations Interpretation Questionnaire (BBSIQ) is a general measure of interpretation bias. Participants rate the likelihood (0-4) of three alternate explanations (two benign and one negative) for why an ambiguous event occurred. To obtain negative external and internal bias scores, the mean of 7 negative ratings for external threats (Items 1c, 4c, 6a, 7b, 9b, 10b, 13c) and the mean of 7 negative ratings for internal threats (Items 2b, 3c, 5a, 8c, 11b, 12a, 14c) will be computed, where higher scores (possible range: 0-4) reflect more severe negative interpretation biases.