Biomedical subjects

Cynthia Tam

Publications and source records attributed to Cynthia Tam.

3 recordsLinked to original sources

PubMed2006

A novel instrument for quantifying grip activity during handwriting.

OBJECTIVE: To describe and exemplify a noninvasive instrumentation system that uniquely records grip forces exerted on the barrel of the writing utensil along with typical temporal and kinematic parameters. DESIGN: Exploratory case series. SETTING: A tertiary care, pediatric rehabilitation hospital. PARTICIPANTS: Convenience sample of 6 primary school children with spastic hemiplegic cerebral palsy (CP) with documented fine motor difficulties and 6 children with no known handwriting difficulties. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Grip and normal forces during handwriting. RESULTS: The instrumentation revealed nontrivial correlations between normal and grip forces (0.55 +/- 0.16), a temporal delay between normal and grip forces (97.7 +/- 16 ms), and a consistent grip-to-normal force ratio (4.3 +/- 1.5), across all participants. Grip force distributions agreed intuitively with qualitative observations of individual grasps of the writing utensil. Further, 5 new parameters derived from grip force measures statistically differentiated between able-bodied children and those with hemiplegic CP. CONCLUSIONS: The proposed instrumentation provides new insight into grip and normal force coordination and has the potential to uncover discriminatory grip force characteristics between writers with and without handwriting difficulties. Further study with larger populations is required to define functional ranges for the new grip measures.

Biomechanical Phenomena↗

PubMed2005

Measuring the outcomes of word cueing technology.

BACKGROUND: Measurement of assistive technology outcomes is complex because many factors (e.g., environment and model of service delivery) influence the successful use of the technology. PURPOSE: Using the example of measuring the outcomes of word cueing technology, this paper presents an approach for measuring assistive technology outcomes. METHOD: The Canadian Occupational Performance Measure (COPM) was administered to 29 children with physical and learning disabilities, between the ages of 3.9 and 19 years. Participants were provided with WordQ, a software program designed to assist the development of writing skills. Follow-up data were collected through telephone interviews. RESULTS: The COPM findings supported the effectiveness of WordQ Version 1 to enhance written productivity, with a mean performance change score of 3.5 (SD = 1.5). The COPM was an effective tool for measuring clients' perceived outcome of word cueing technology. Telephone interview was considered a successful method for collecting outcome data. PRACTICE IMPLICATIONS: A mix of tools and methodologies should be used to gain a comprehensive understanding of the impact of assistive technology.

Adolescent↗

PubMed2002

Perceived benefits of word prediction intervention on written productivity in children with spina bifida and hydrocephalus.

Word prediction has been commonly used as a tool to enhance written productivity. However, the effectiveness of word prediction as a strategy to meet this targeted outcome has not been established. Using a single-subject alternating treatments design, this study evaluated the effect of word prediction on written productivity from the users' perspectives. Three girls and one boy aged 10-12 with spina bifida and hydrocephalus participated in the study over a period of 20 days. The Canadian Occupational Performance Measure (COPM) was used to measure changes in perception of written productivity. Analysis of individual participant data showed that participants perceived word prediction to have the potential to influence written productivity on some writing tasks. Quantitative analysis using a randomization test did not reveal any significant changes in COPM scores after using word prediction. The varied abilities of the participants in the study and the small sample size may be the reasons why statistical analysis did not show any changes. The limitations of this study included use of a copy task, lack of a supporting measure to COPM and limited generalizability. Further studies with a larger sample are necessary to explore the skills required for successful use of word prediction and the impact of word prediction on specific tasks.

Child↗