Proximity control Moving close to a misbehaving student. Qualitative data Observations that consist of words, labels, or numerical codes. More difficult to measure than quantitative data. Quantitative data Observations consisting of numbers that indicate differences in amounts. A sample selected so that at each stage of the sampling, all members of the population have an equal chance of being included in the sample.
Range Indicates the measure of variability from the highest score to the lowest score.
Reliability A test is said to be reliable if a student's scores are about the same in repeated testing. Reversibility Piaget's term for a child's ability to use cognitive operations to take things apart and to reverse thinking. Ripple effect Kounin's term to signify the effects on students seated near a particular student who is being reprimanded or praised. Semantics Refers to the meaning of words, the relationship between ideas and words. Seriation Piaget's term that refers to the ability of children to arrange objects by increasing or decreasing size.