Maryam Rezaeian; Zahra Assadollahi; Hossien Azin; Ayat Kaeidi; Mahdieh Azin
Volume 23, Issue 3 , 2021
Abstract
Objectives: Motor imagery (MI) is the visualization of action without its overt performance. One of the measures of explicit MI is mental chronometry which has been applied to multiple sclerosis (MS) patients; nonetheless, the reliability ...
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Objectives: Motor imagery (MI) is the visualization of action without its overt performance. One of the measures of explicit MI is mental chronometry which has been applied to multiple sclerosis (MS) patients; nonetheless, the reliability and validity of this tool has been never confirmed. Therefore, the present study aimed to assess the reliability and validity of mental chronometry in MS patients.
Methods: A number of 60 MS patients who met the inclusion criteria were included in the present study via the census method. Thereafter, 20 MS patients were tested via mental chronometry based on the box and block test, as well as kinesthetic and visual imagery questionnaire-20 (KVIQ-20) in two sessions with a 10-day interval. Intra-class correlation coefficients (ICCs) were calculated to determine the test-retest reliability of mental chronometry. Pearsons correlation analysis was used to evaluate criterion validity with the KVIQ-20.
Results: The test-retest reliability for the mental chronometry was good (ICCs: visual analogue scale=0.88, mean execution and motor imagery absolute difference= 0.75, imagery duration=0.91, and execution duration=0.97). Moreover, the concurrent validity between the visual analogue scale of mental chronometry and KVIQ-20 was good.
Conclusion: As evidenced by the results of the present study, the mental chronometry based on box and block is a reliable and valid tool for the assessment of motor imagery in MS patients.
Mohammad Ebrahim Mahdavi; Akram Pourbakht; Akram Parand; Shohreh Jalaie; Maryam Rezaeian; Elham Moradiju
Volume 19, Issue 4 , April 2017, , Pages 1-5
Abstract
Background: Previous studies have reported the weakness of recognition of speech-in-noise and dichotic listening deficit in Learning-Disabled (LD) children. This study aimed at further investigating these two deficits in LD children.Methods: Overall, 33 LD children with dichotic listening deficit from ...
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Background: Previous studies have reported the weakness of recognition of speech-in-noise and dichotic listening deficit in Learning-Disabled (LD) children. This study aimed at further investigating these two deficits in LD children.Methods: Overall, 33 LD children with dichotic listening deficit from a government rehabilitation center and 39 normal-achieving (NLA) children from three elementary schools were selected with the convenience sampling method to participate in this crosssectional study (Tehran, Iran). Learning-disabled children were categorized in two categories of unilateral dichotic separation deficit (UDSD) and bilateral dichotic separation deficit (BDSD).Results: Mean (±SD) of signal-to-noise ratio (SNR) for binaural recognition of words and digits-in-noise in LD children (3.5±1.7 and -11.0±2.1 dB, respectively) was significantly higher than corresponding means of NLA children (1.8±1.1 and -13.8±1.1 dB, respectively (P = 0.001)). Mean SNR of the right ear in BDSD children in recognition of words-in-noise (5.0±1.9 dB) was significantly higher than that of the right ear in UDSD children (3.5 ± 1.5 dB; P = 0.018, d = 0.96).Conclusions: Monaural and binaural recognition of words and digits-in-noise are impaired in LD children with dichotic listening deficit. It seems that BDSD children show an inter-aural asymmetry in recognition of words-in-noise with poorer performance in the right ear.
