Final answer:
Hannah is assessing test-retest reliability by observing how consistent the results of her scale for assessing social interaction are when applied at two different times. To have a normed and standardized test, it should be tested on a representative sample, and to have a valid measurement, the test must actually measure what it intends to.
Step-by-step explanation:
Hannah is assessing test-retest reliability by rating the same children on two different occasions. This type of reliability is concerned with the consistency of a measure over time. Essentially, if the scale produces similar results on two different occasions, then it can be considered to have test-retest reliability. It is crucial for a test to be reliable so that psychologists can be confident that it is accurately measuring what it is supposed to measure, without the results being due to chance or random variability.
To norm and standardize a test, it must be tested on a representative sample. This ensures that the test is valid across various populations and can be generalized to a wider audience than the sample it was originally tested on. In Jane's case, where she attributes her bad grade to her professor's personal dislike rather than her performance, she is demonstrating an external locus of control.
Finally, a measurement is considered valid if it actually measures what it is intended to measure. Validity is crucial for the results of the study to be trusted and for the implications of the study to be accurate.