Psychometric Values of a New Scale: The Rett Syndrome Fear of Movement Scale (RSFMS)
Abstract
:1. Introduction
1.1. Fear of Movement
1.2. Fear Avoidance Model
1.3. Evaluation and Measurement of Behavioral Characteristics in RTT
2. Methods
2.1. Ethical Issues
2.2. General Description of the Study
- Testing FOM as observed by the participants’ body language using a new observational assessment tool (RSFMS) through video records.
- Testing FOM as observed by the facial expressions of the participants by using the Facial Action Coding System (FACS).
- Testing FOM as observed by the body language of the participants using the Pain and Discomfort Scale (PADS).
2.3. Research Hypotheses
- Differences in facial and bodily reactions will be found between the calm and active situations in both groups.
- In the movement situations, the facial expressions and body reactions will be found to be more pronounced among the participants with RTT (research group) compared to the control group, indicating a stress/anxiety/fear/excitement situation for the research group.
- A highly significant and positive correlation will be found between the score of the new RSFMS assessment tool and the values of the behavioral/facial/bodily indicators, enabling the validation of the new tool.
2.4. Participants
2.5. Procedure
- Movement sequence 1: the researcher moved the participant’s upper and lower limbs. For the upper limbs, the researcher held the participant’s wrists and performed five simultaneous and reciprocal arm movements up and downwards (flexion of both shoulders, one after the other) and five forward and back movements (flexion/extension of both elbows, one after the other). The lower limb movements were conducted by holding the participant’s ankles and performing five simultaneous and reciprocal lower limb movements up and down (flexion of both shoulders, one after the other).
- Movement sequence 2: the passive transfer of each participant from the seat she was sitting on to a nearby sofa/couch (20 cm away). The participant was lifted and moved by the researcher.
2.6. Measurement and Evaluation Tools
2.6.1. Rett Syndrome Behavioral Questionnaire (RSBQ)
2.6.2. Rett Syndrome Fear of Movement Scale (RSFMS)
2.6.3. Facial Action Coding System (FACS)
2.6.4. Pain and Discomfort Scale (PADS)
2.7. Data Processing
3. Results
3.1. Descriptive Statistics
3.2. Validation Process
3.2.1. RSFMS Scores
3.2.2. PADS
3.2.3. FACS
3.2.4. Correlations
3.2.5. Psychometric Traits of RSFMS
3.2.6. Cut-off Point for Defining Fear of Movement Using RSMFS
3.2.7. Sensitivity, Specificity, Positive/Negative Predictive Value, and Correctness
3.2.8. Gaps in Tester Skill
4. Discussion
4.1. Summary of Key Findings
4.2. The Nature and Level of the Movement in the Present Study
4.3. The Contribution of Research to the Clinical and Theoretical Fields
4.4. The Limitations of the Study and Proposals for Further Research
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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N | Age | Ambulatory Status | Genetic Mutation |
---|---|---|---|
1. | 8 | Non-Ambulatory | c. 484C>T |
2. | 16 | Assisted Ambulation | ----- |
3. | 33 | Non-Ambulatory | D156H |
4. | 20 | Non-Ambulatory | R255X |
5. | 8 | Assisted Ambulation | WT |
6. | 18 | Assisted Ambulation | ------- |
7. | 11 | Non-Ambulatory | T158M |
8. | 10 | Non-Ambulatory | C1157-1198 Del 41BP |
9. | 11 | Assisted Ambulation | T158M |
10. | 19 | Non-Ambulatory | 62+1delGT |
11. | 18 | Non-Ambulatory | R255X |
12. | 5 | Independent Ambulation | R270X |
Age at the Study Beginning | RSBQ Scores | RSFMS Scores | PADS Scores | FACS Scores | |||||
---|---|---|---|---|---|---|---|---|---|
Rest Mode | Movement Mode | Rest Mode | Movement Mode | Rest Mode | Movement Mode | ||||
Research group (N = 12) | Avg (SD) | 14 (7.4) | 38.8 (15.0) | 2.3 (2.3) | 12.5 (5.9) | 2.4 (1.2) | 6.7 (2.2) | 8 (5.0) | 21.5 (10.8) |
Min–Max | 5–33 | 19–69 | 0–7 | 6.5–24.5 | 0–5 | 4–13 | 1–18 | 10–47 | |
Control Group (N = 13) | Avg (SD) | 12.8 (7.5) | - | 0 (0.0) | 1.4(1.4) | 1.2 (1.2) | 2.1 (2.5) | 4.2 (2.1) | 3.6 (2.2) |
Min–Max | 5–33 | - | 0–0 | 0–4 | 0–7 | 0–4 | 2–8 | 1–8 |
Psychometric Feature of RSFMS | Value |
---|---|
Interrater reliability | r = 0.993 |
Intra-rater reliability | r = 0.958 |
Internal consistency | α = 0.765 |
Cut-off point | 0.18 × Number of items on the scale used |
Sensitivity | 100% |
Specificity | 83.3% |
Positive predictive value | 92.3% |
Negative predictive value | 100% |
Accuracy | 94.4% |
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Lotan, M.; Zwilling, M.; Romano, A. Psychometric Values of a New Scale: The Rett Syndrome Fear of Movement Scale (RSFMS). Diagnostics 2023, 13, 2148. https://doi.org/10.3390/diagnostics13132148
Lotan M, Zwilling M, Romano A. Psychometric Values of a New Scale: The Rett Syndrome Fear of Movement Scale (RSFMS). Diagnostics. 2023; 13(13):2148. https://doi.org/10.3390/diagnostics13132148
Chicago/Turabian StyleLotan, Meir, Moti Zwilling, and Alberto Romano. 2023. "Psychometric Values of a New Scale: The Rett Syndrome Fear of Movement Scale (RSFMS)" Diagnostics 13, no. 13: 2148. https://doi.org/10.3390/diagnostics13132148