SPCE 630 MIDTERM QUESTIONS & ANSWERS
Threats to internal validity include: - Answer -History, maturation, testing, procedural
infidelity, testing, instrumentation, selection bias, multiple treatment interference, data
instability, cycliccal variability, regression to the mean, adaptation, Hawthorne effect
History: - Answer -Events that occur during the experiment but that are not related to
the planned procedural changes that may influence the outcomes
Maturation - Answer -Changes in behavior due to the passage of time.
Testing - Answer -Occurs when participants need to respond to the same test
repeatedly during a baseline or probe condition, which influences responding.
Instrumentation - Answer -Threats related to the measurement system, and are of
concern because of repeated measurement by human observers who may make errors.
Procedural Infidelity - Answer -Inconsistent implementation of the experimental
condition.
Attrition - Answer -The loss of participants during a study, which limits the generality of
findings.
Multiple Treatment Interference - Answer -Occurs when a participant's behavior is
influenced by more than one planned intervention during the course of a study
Cyclical Variability - Answer -A type of data instability that refers to a repeated and
predictable pattern in the data series over time.
Sequential confounding: - Answer --May influence the participants' responding based
on the order in which the experimental conditions are introduced to participants.
-Can be controlled by counterbalancing.
The hypothesis that states that there is no significant difference between samples is: -
Answer -The null hypothesis
Amanda is an RBT at an ABA clinic. She is working with her client, Jerrell, to decrease
aggressive behaviors (i.e., biting others). She has collected data for the frequency of
Jerrell's bites for three weeks. Calculate the mean, median, and mode of the following
data set (round up to the nearest whole number):
Week 1: 12, 11, 10, 22, 22
Week 2: 7, 8, 13, 21, 17
Week 3: 16, 7, 9, 3, 0 - Answer -Mean =12, Median = 11, Mode = 7, 22
Threats to internal validity include: - Answer -History, maturation, testing, procedural
infidelity, testing, instrumentation, selection bias, multiple treatment interference, data
instability, cycliccal variability, regression to the mean, adaptation, Hawthorne effect
History: - Answer -Events that occur during the experiment but that are not related to
the planned procedural changes that may influence the outcomes
Maturation - Answer -Changes in behavior due to the passage of time.
Testing - Answer -Occurs when participants need to respond to the same test
repeatedly during a baseline or probe condition, which influences responding.
Instrumentation - Answer -Threats related to the measurement system, and are of
concern because of repeated measurement by human observers who may make errors.
Procedural Infidelity - Answer -Inconsistent implementation of the experimental
condition.
Attrition - Answer -The loss of participants during a study, which limits the generality of
findings.
Multiple Treatment Interference - Answer -Occurs when a participant's behavior is
influenced by more than one planned intervention during the course of a study
Cyclical Variability - Answer -A type of data instability that refers to a repeated and
predictable pattern in the data series over time.
Sequential confounding: - Answer --May influence the participants' responding based
on the order in which the experimental conditions are introduced to participants.
-Can be controlled by counterbalancing.
The hypothesis that states that there is no significant difference between samples is: -
Answer -The null hypothesis
Amanda is an RBT at an ABA clinic. She is working with her client, Jerrell, to decrease
aggressive behaviors (i.e., biting others). She has collected data for the frequency of
Jerrell's bites for three weeks. Calculate the mean, median, and mode of the following
data set (round up to the nearest whole number):
Week 1: 12, 11, 10, 22, 22
Week 2: 7, 8, 13, 21, 17
Week 3: 16, 7, 9, 3, 0 - Answer -Mean =12, Median = 11, Mode = 7, 22
