SOLVED

51)The interrupted time-series design is able to control for regression to the mean because A)by employing multiple measures, it gives several points of comparison over a long period of time. B)it adds a constant to all scores. C)it multiplies all scores by a constant. D)by taking refined measurements, the design uses only one composite score, thereby reducing error variance. 52)One potential confounding factor in the simple pretest-posttest design, which the interrupted time-series designs controls for, is A)regression to the mean. B)experimenter bias. C)the double-blind effect. D)an order effect. 53)Interrupted time-series designs are particularly useful in all of the following situations EXCEPT A)large-scale studies. B)evaluating events that have already occurred. C)clinical and naturalistic settings. D)situations in which it is impossible to make more than one measurement. 54)By using an interrupted time-series design with a single group of participants, researchers can A)randomly assign participants to treatment conditions. B)take advantage of data already gathered over a long period of time. C)create a simulated between-subjects design. D)attenuate reliability. 55)An interrupted time-series design is particularly useful when A)there are no issues of causality to be addressed. B)the presumed causal event occurs to only some members of a population. C)the presumed causal event occurs to all members of a population. D)the research is concerned with attempting to predict aggressive behaviour in children. 56)If researchers were interested in studying the effects of Quebec raising the drinking age to 21 on traumatic brain injury, what type of research design would be ideal? A)A standard 2 × 2 factorial. B)An equivalent control-group design. C)A between-subjects design. D)An interrupted time-series design. 57)Which of the following is an example of an interrupted time-series design? A)A school wants to try a new teaching program and test its effectiveness. Mrs. Jones’ first grade class is given the new program. Mrs. Jones’ class and Mrs. Brown’s first grade class (who received the traditional teaching method) both take an exam at the end of the year designed to determine the amount that each class learned. B)The province reduces the speed limit from 65 to 55. Records are gathered showing the number of highway deaths per month for the year prior to the reduction in the speed limit and for the year following the reduction. C)A new drug treatment for AIDS is being tested. Patients on a waiting list are randomly assigned to receive either the new drug treatment or a placebo. The number of visits to the doctor that the drug group and the placebo group make during the next year will be monitored and compared. D)Victims of a hurricane are interviewed and asked their opinions about the needs that were not met following the disaster. This information is then turned into a social program to aid disaster victims. 58)The two most important potential confounding factors in time-series designs are A)history and instrumentation. B)selection and regression to the mean. C)regression to the mean and cohort effects. D)cohort effects and history. 59)If the province of Ontario were to use an interrupted time-series design to study the effects of raising its speed limit to 65 mph, what type of confounding variables might present a problem? A)Confounding due to selection and cohort effects. B)Confounding due to history and instrumentation. C)Confounding due to maturation and testing. D)Confounding due to regression to the mean. 60)Any procedure that requires measurement over a fairly long period of time is particularly vulnerable to confounding by A)entropy. B)selection ratio. C)geography. D)