HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: What is the procedure of conducting controlled experiments with human
subjects?
Answer:
- Post advertisements for subjects Organize subjects into groups Schedule
pre-experiment testing of subjects (questionnaire) Fill out consent forms Assign
treatment (condition and experiment) Follow up visits (may not be needed)
Post-experiment testing (questionnaire) Rewards (half at the beginning, half at end?)
Q: What is bias?
Answer:
- Biases are systematic errors in human reasoning and acting, as psychology tells. In
scientific research biases has to be taken into account as can influence, even heavily,
research outcomes.
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: They can be
Answer:
cognitive bias: deal with human brain dynamics (anchoring, confirmation, halo
effect, ...)
statistical bias: deal with statistic hard analysis (survivorship, cherry picking,
selection, ...)
contextual bias: publication / examiner dependent
Q: What is randomization?
Answer:
- Randomization is a experimental design technique to help within subject studies to
be minimize biases. Basically a person is subject to the different conditions in a
random way, minimizing the effect of the previous condition in samples of data.
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: What is the meaning of the p value in t-tests and ANOVA?
Answer:
- The p-value in t-tests and ANOVA is a statistical indicator on how probable is to
obtain the given results if the null hypothesis is correct, generally the lower the more
the null hypothesis can be rejected.
Q: Basically it tells us if our results are likely due to a real difference or just random
chance.
Answer:
Generally a 0,05 (5%) threshold is employed, lower the null hypothesis is rejected
(the
samples come from two different populations), the higher nothing can be said (we
cannot say if
the samples come from the same population).
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: What different statistical methods should one use for controlled studies and
why?
Answer:
siehe tabelle
Q: When does one use a t-test and when an ANOVA?
Answer:
T-tests: to compare the means of two groups.
Q: ANOVA
Answer:
compares the means of more than two groups, thus the independent variable has
more than 2
levels.
Update
Q: What is the procedure of conducting controlled experiments with human
subjects?
Answer:
- Post advertisements for subjects Organize subjects into groups Schedule
pre-experiment testing of subjects (questionnaire) Fill out consent forms Assign
treatment (condition and experiment) Follow up visits (may not be needed)
Post-experiment testing (questionnaire) Rewards (half at the beginning, half at end?)
Q: What is bias?
Answer:
- Biases are systematic errors in human reasoning and acting, as psychology tells. In
scientific research biases has to be taken into account as can influence, even heavily,
research outcomes.
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: They can be
Answer:
cognitive bias: deal with human brain dynamics (anchoring, confirmation, halo
effect, ...)
statistical bias: deal with statistic hard analysis (survivorship, cherry picking,
selection, ...)
contextual bias: publication / examiner dependent
Q: What is randomization?
Answer:
- Randomization is a experimental design technique to help within subject studies to
be minimize biases. Basically a person is subject to the different conditions in a
random way, minimizing the effect of the previous condition in samples of data.
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: What is the meaning of the p value in t-tests and ANOVA?
Answer:
- The p-value in t-tests and ANOVA is a statistical indicator on how probable is to
obtain the given results if the null hypothesis is correct, generally the lower the more
the null hypothesis can be rejected.
Q: Basically it tells us if our results are likely due to a real difference or just random
chance.
Answer:
Generally a 0,05 (5%) threshold is employed, lower the null hypothesis is rejected
(the
samples come from two different populations), the higher nothing can be said (we
cannot say if
the samples come from the same population).
, HRI Questions and Answers with Verified Solutions | Latest 2026
Update
Q: What different statistical methods should one use for controlled studies and
why?
Answer:
siehe tabelle
Q: When does one use a t-test and when an ANOVA?
Answer:
T-tests: to compare the means of two groups.
Q: ANOVA
Answer:
compares the means of more than two groups, thus the independent variable has
more than 2
levels.
