The Importance Of Handedness

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Handedness is dominance of one hand over the other , or the unequal distribution of fine motor skills between right and left hands. It refers to the tendency of humans to be more dextrous or skilled with one hand over the other.
By self report the rates of right , left and mixed handedness are
56.1%,26.3% and 17.5% respectively. The rate of handedness conversion is 2.7% to 11.8% in prior studies based on the total population including innately right handed people. The rate of conversion of innately left handed people has not been reported.
Cognition is the mental action or process of acquiring knowledge
And understanding through thought , experience and the senses.
It includes the ability to concentrate , remember and learn.
Handedness
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• Procedure- Hand-held dynamometer is used to measure bilateral grip strength and based on that handedness is classified. At the start position , the subject’s elbow was flexed at a 90 degree angle with the forearm parallel to the floor. The dynamometer was maximally squeezed for a 3 second count while simultaneously lowering the arm top full extension. Subjects practices this procedure once per hand, after which measurements were recorded to the nearest 0.1 pound(?) . The instrumental precision error was 1.0%. o Self-reported handedness is measured by questionnaire included the following question about hand preference : “If you were originally left-handed, were you ever strongly encouraged or forced to switch to your right hand?” and allowed the following response choices: 1)Never left- handed, always have been right handed; 2)Naturally and still left-handed; 3)Yes, forced to change to right …show more content…
o Cognitive measures has been done by
-Trial Making Test A and B tests visuomotor tracking and attention. In Trial A test subjects scan a page continuously to identify numbers in sequence and join them & in Trial B test subjects identify the numbers again including letters too in a specified sequence while shifting from number to letter sets. A maximum of 300 seconds allowed; performance is rated by the time required to finish the test; the greater the score, the poorer the test performance.
-Mini Mental State Examination (MMSE) assesses orientation, registration, attention, calculation, language and recall. Total MMSE scores range from 0-30. Two items from the MMSE were analyzed separately: counting backward from 100 by 7’s ( which assesses calculation) and spelling the word “world” backward, which assesses attention. For both items, the maximum possible score is 5.
• -VAK test or Visual, Auditory, Kinesthetic learning style questionnaire for assessing their learning style. The style is assessed on the basis of number of maximum option as a, b, c.
• Confidentiality??
• Statistical analysis??
• Ethical considerations ??
Implications

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