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MOD 5 FINALS HCI2

QuestionAnswer
In HCI, experimental units are typically: Human subjects
Fitts’ Law in HCI relates to: Pointer movement time
Which design involves repeated testing over time? Time-series design
Which design uses both pretest and posttest but without random assignment? Quasi-experimental
Which of the following is a type of true experimental design? Solomon four-group
Which threat involves the control group unintentionally receiving the treatment? Treatment diffusion
Loss of subjects during an experiment affects: Internal validity
Which of the following is NOT a component of an experiment? Hypothesis
Which design compares groups that are likely different before the study begins? Nonequivalent before-after
Which design is considered the most accurate in experimental research? True experimental
A researcher uses four groups to test the effect of pretesting and treatment. What design is this? Solomon four-group
A control group works harder to outperform the experimental group. What threat is this? John Henry effect
A researcher wants to test a new app feature. They randomly assign users and use both pretest and posttest. What design is this? Pretest-posttest equivalent
A researcher wants to test the effect of a new app feature. They use four groups to test the effect of pretesting and treatment. What design is this? Solomon four-group
A researcher wants to test a new e-learning platform. They assign students randomly and use both pretest and posttest. What is the best design to use? Pretest-posttest equivalent
A researcher uses a random digit table to assign participants to groups. What is the purpose of this? Ensure fairness
A study finds that students improved in math scores, but the improvement may be due to natural development over time. What threat is this? Maturation
A teacher implements a new teaching strategy and measures student performance weekly for 2 months. What design is this? Time-series
A researcher compares two groups that are known to differ before the experiment. What design is this? Nonequivalent before-after
A teacher compares two classes: one uses a new reading strategy, the other does not. No random assignment is done. What design is this? Quasi-experimental
Which design compares two groups, one treated and one untreated, after treatment? Static-group comparison.
Which of the following is a type of true experimental design? Solomon four-group
Which design includes only a posttest after treatment? One-shot case study.
A researcher wants to test a new keyboard layout. Participants are randomly assigned and only posttest data is collected What design is used? Posttest equivalent.
In a study, participants improve performance simply because they know they are being observed What effect is this? Hawthorne effect.
A study on a new medication uses random assignment and measures outcomes only after treatment. What design is this? Posttest equivalent
A study measures typing speed using QWERTY and DVORAK keyboards. Participants have no prior experience. What is being controlled? Subject characteristics
Loss of subjects during an experiment affects: Internal validity
Which of the following is a threat to internal validity? Control group demoralization.
Which method is commonly used for randomization in modern HCI studies? Random digit table
The group that receives the treatment in an experiment is called: Experimental group
Which design compares two groups, one treated and one untreated, after treatment? Static-group comparison
A control group feels discouraged because they didn’t receive the new teaching method. What threat is this? Control group demoralization
A study tracks user engagement weekly for 3 months before and after a UI change. What design is this? Time-series
A researcher uses a random digit table to assign participants to groups. What is the purpose of this? Control hidden variables
A group of students drops out of a study before the posttest. What threat to validity is this? Loss of subjects
A researcher tests a new training program on one group and compares pretest and posttest scores. What design is this? One-group pretest-posttest.
Created by: PipoyKuraku
 

 



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