Neuroscience
van der Meulen I, van de Sandt-Koenderman WM, Duivenvoorden HJ, & Ribbers GM (2009). Measuring verbal and non-verbal communication in aphasia: Reliability, validity, and sensitivity to change of the Scenario Test.
International Joutnal of Language and Communication Disorders
Background: This study explores the psychometric qualities of the Scenario Test, a new test to assess daily-life communication in severe aphasia. The test is innovative in that it: (1) examines the effectiveness of verbal and non-verbal communication; and (2) assesses patients' communication in an interactive setting, with a supportive communication partner. Aims: To determine the reliability, validity, and sensitivity to change of the Scenario Test and discuss its clinical value. Methods & Procedures: The Scenario Test was administered to 122 persons with aphasia after stroke and to 25 non-aphasic controls. Analyses were performed for the entire group of persons with aphasia, as well as for a subgroup of persons unable to communicate verbally (n = 43). Reliability (internal consistency, test-retest reliability, inter-judge, and intra-judge reliability) and validity (internal validity, convergent validity, known-groups validity) and sensitivity to change were examined using standard psychometric methods. Outcomes & Results: The Scenario Test showed high levels of reliability. Internal consistency (Cronbach's alpha = 0.96; item-rest correlations = 0.58-0.82) and test-retest reliability (ICC = 0.98) were high. Agreement between judges in total scores was good, as indicated by the high inter- and intra-judge reliability (ICC = 0.86-1.00). Agreement in scores on the individual items was also good (square-weighted kappa values 0.61-0.92). The test demonstrated good levels of validity. A principal component analysis for categorical data identified two dimensions, interpreted as general communication and communicative creativity. Correlations with three other instruments measuring communication in aphasia, that is, Spontaneous Speech interview from the Aachen Aphasia Test (AAT), Amsterdam-Nijmegen Everyday Language Test (ANELT), and Communicative Effectiveness Index (CETI), were moderate to strong (0.50-0.85) suggesting good convergent validity. Group differences were observed between persons with aphasia and non-aphasic controls, as well as between persons with aphasia unable to use speech to convey information and those able to communicate verbally; this indicates good known-groups validity. The test was sensitive to changes in performance, measured over a period of 6 months. Conclusions & Implications: The data support the reliability and validity of the Scenario Test as an instrument for examining daily-life communication in aphasia. The test focuses on multimodal communication; its psychometric qualities enable future studies on the effect of Alternative and Augmentative Communication (AAC) training in aphasia.
PMID: 19724959 [PubMed - as supplied by publisher]
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- Abstract Of The Day: Aphasia
Hengst JA, Frame SR, Neuman-Stritzel T, & Gannaway R. Using others' words: Conversational use of reported speech by individuals with aphasia and their communication partners. Journal of Speech, Language, and Hearing Research. 2005 Feb; 48(1): 137-156....
Neuroscience
Neuropsychology Abstract of the Day: Aphasia Assessment
van der Meulen I, van de Sandt-Koenderman WM, Duivenvoorden HJ, & Ribbers GM (2009). Measuring verbal and non-verbal communication in aphasia: Reliability, validity, and sensitivity to change of the Scenario Test.
International Joutnal of Language and Communication Disorders
Background: This study explores the psychometric qualities of the Scenario Test, a new test to assess daily-life communication in severe aphasia. The test is innovative in that it: (1) examines the effectiveness of verbal and non-verbal communication; and (2) assesses patients' communication in an interactive setting, with a supportive communication partner. Aims: To determine the reliability, validity, and sensitivity to change of the Scenario Test and discuss its clinical value. Methods & Procedures: The Scenario Test was administered to 122 persons with aphasia after stroke and to 25 non-aphasic controls. Analyses were performed for the entire group of persons with aphasia, as well as for a subgroup of persons unable to communicate verbally (n = 43). Reliability (internal consistency, test-retest reliability, inter-judge, and intra-judge reliability) and validity (internal validity, convergent validity, known-groups validity) and sensitivity to change were examined using standard psychometric methods. Outcomes & Results: The Scenario Test showed high levels of reliability. Internal consistency (Cronbach's alpha = 0.96; item-rest correlations = 0.58-0.82) and test-retest reliability (ICC = 0.98) were high. Agreement between judges in total scores was good, as indicated by the high inter- and intra-judge reliability (ICC = 0.86-1.00). Agreement in scores on the individual items was also good (square-weighted kappa values 0.61-0.92). The test demonstrated good levels of validity. A principal component analysis for categorical data identified two dimensions, interpreted as general communication and communicative creativity. Correlations with three other instruments measuring communication in aphasia, that is, Spontaneous Speech interview from the Aachen Aphasia Test (AAT), Amsterdam-Nijmegen Everyday Language Test (ANELT), and Communicative Effectiveness Index (CETI), were moderate to strong (0.50-0.85) suggesting good convergent validity. Group differences were observed between persons with aphasia and non-aphasic controls, as well as between persons with aphasia unable to use speech to convey information and those able to communicate verbally; this indicates good known-groups validity. The test was sensitive to changes in performance, measured over a period of 6 months. Conclusions & Implications: The data support the reliability and validity of the Scenario Test as an instrument for examining daily-life communication in aphasia. The test focuses on multimodal communication; its psychometric qualities enable future studies on the effect of Alternative and Augmentative Communication (AAC) training in aphasia.
PMID: 19724959 [PubMed - as supplied by publisher]
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- Neuropsychology Abstract Of The Day: Schizophrenia
Barrera A, McKenna PJ, & Berrios GE. Two new scales of formal thought disorder in schizophrenia. Psychiatry Research. 2007 Nov 6; [Epub ahead of print] Warneford Hospital, Oxford, OX3 7JX, UK. Information provided by patients and respective carers may...
- Neuropsychology Abstract Of The Day: Aphasia And The Assessment Of Depression
Townend E, Brady M, McLaughlan K. A Systematic Evaluation of the Adaptation of Depression Diagnostic Methods for Stroke Survivors Who Have Aphasia. Stroke. 2007 Oct 11; [Epub ahead of print] From the NMAHP Research Unit, Buchannan House, Glasgow Caledonian...
- Abstract Of The Day: Aphasia Screening
Salter K, Jutai J, Foley N, Hellings C, & Teasell R. (2006). Identification of aphasia post stroke: A review of screening assessment tools. Brain Injury, 20(6),, 559-568. Department of Physical Medicine and Rehabilitation, Parkwood Hospital, St. Joseph's...
- Abstract Of The Day: Aphasia
Hengst JA, Frame SR, Neuman-Stritzel T, & Gannaway R. Using others' words: Conversational use of reported speech by individuals with aphasia and their communication partners. Journal of Speech, Language, and Hearing Research. 2005 Feb; 48(1): 137-156....