Answer to Question 1
Reliability is an indicator of a measure's internal consistency. A measure is reliable when different attempts at measuring something converge on the same result. When a measuring process provides reproducible results, the measuring instrument is reliable. Internal consistency is a term used to represent a measure's homogeneity and can be measured by correlating scores on subsets of items making up a scale. The split-half method of checking reliability is performed by taking half the items from a scale (e.g., odd-numbered items) and checking them against the results from the other half (even-numbered items). The two scale halves should correlate highly. Coefficient alpha is the most commonly applied estimate of a composite scale's reliability by computing the average of all possible split-half reliabilities from a multiple-item scale. This coefficient demonstrates whether or not the different items converge and ranges from 0 to 1, with values between 0.80 and 0.96 considered to have very good reliability. The test-retest method of determining reliability involves administering the same scale or measure on the same respondents at two separate times to test for stability.
Answer to Question 2
B
Definition of affective strategy
The small-scale distribution of different tree species in a Douglas-fir forest is determined by both
Neurological Flow Sheet, Including Glasgow Coma Scale
A medical assistant listening to the patient and physician discuss the patient's care.
Patients unable to stand may be weighed using a chair scale.
Ascaris. (Sinclair Stammers/Science Photo Library/Photo Researchers, Inc.)
Flow Patterns and Large-Scale Weather