Stats Revision

History

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Maturation

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Measurement

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Statistical Regression

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Selection

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Instrumentation

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Mortality or attrition

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Interaction of the 7 threats with one another

Lowering of extremely high scores or the raising of extremely low scores during post-testing

Changes in biological and psychological conditions that occur in time. e.g., age, fatigue, hunger

Changes that occur over time in the measurement of the DV. e.g., human observer

Changes due to simple exposure of participants to the measurements, I.e., pre-test may sensitise participants

Differential loss of participants during a study. I.e., greater loss from one group than from others

Without random assignment we don't know if groups were equivalent prior to treatment

Affecting performance occurring between pre- and post- measurement of the DV

Stats Revision

More Quizzes