Exam page 2 Flashcards
What is the difference between true experimental designs and quasi-experimental design?
True experimantal design use random assignment, where quasi-experimental designs do not.
______ in quasi-experimental design is more difficult than in true experiments because quasi-experimental design lack the important features of true experiments such as random assignment conditions.
Casual Interference
Events that occur between the first and second measurement period but are not part of the manipulation are called ______ effects.
History
Which of the following if a threat to the internal validity of studies using one-group pretest-posttest design?
Statistical regression
In the context of one group pretest-posttest design the associated threats to internal validity, any changes that occur systematically over time are called _______ effect.
maturation
Regression toward the mean refers to the fact that:
Extreme scores tend to change towards the less extreme mean.
Over time, human observes may become fatigued or change the standards on which observations are based. When this change in measurement occurs over time, a researcher might attribute to
Instrument decay
____ usually occurs when participants who form the two groups in an experiment are chosen from existing natural groups.
selection bias
Selection differences are less likely to occur when researchers
Randomly assign participats to groups
The interrupted time series design involves
making observations over an extended period of time before and after treatment is instituted
Developmental psychologists often study the ways that the individuals change as as a function of ______
age
which of the following are two general methods for studying individuals of different ages?
Cross-sectional and longitudinal research design
Which of the following best describes a longitudinal study on children’s development?
The same children are tested at 1, 3, 5, and 10 years of age.
Which of the following scales of measurement lack numeric properties?
nominal
