EXSS 2025 Motor Control and Learning
Experiment 4: Reaction, Movement& Response Time in Decision-Making Tasks
I. Question 3:
(i) Why are multiple repeated trials in each task required
(ii) Why do we need to complete checks on the data (identify errors etc)?
(iii) Why was there a variable fore-period between the start of a trial and the appearance of a stimulus in the tasks?
(iv) Why was randomization necessary from Task 1b onwards?
(v) Why was 80%(congruent) vs 20%(incongruent) split used in Task 2?
II. Background
(i) The importance of investigating reaction time:
-Reaction time and execution of motor movements are closely correlated. These measures have been fundamental to the determination that information processing and decision-making occurs …show more content…
Reliability is the consistency of the experimental data. We can verify the results by testing for reproducibility. If the experiments are conducted correctly in a same way, they must produce similar results. Thus we can test on it to figure out if there are any possible mistakes. Beside, repeated trials can also repeated to give more data for analysis.
(ii) Why do we need to complete checks on the data (identify errors etc)?
To ensure the validity of the test. Validity is the absence of bias. There are three types of error in this reaction time test, namely direction error, anticipation error and timing error.
-Direction error means that the reacting movement is not on the same side as the target. Such na unstandardized response can’t truly reflect the actual reaction time. -Anticipation error happens when the reaction time is below 100msec, which may indicate that the performer is not reacting upon the appearance of stimulus, but initiate reaction prior to the stimulus.
-Timing Error means that the reaction time exceed 1000msec. This may be due to other issues in the experiment, such as participants actually not answering the question.
(iii) Why was there a variable fore-period between the start of a trial and the appearance of a stimulus in the
Experiment 4: Reaction, Movement& Response Time in Decision-Making Tasks
I. Question 3:
(i) Why are multiple repeated trials in each task required
(ii) Why do we need to complete checks on the data (identify errors etc)?
(iii) Why was there a variable fore-period between the start of a trial and the appearance of a stimulus in the tasks?
(iv) Why was randomization necessary from Task 1b onwards?
(v) Why was 80%(congruent) vs 20%(incongruent) split used in Task 2?
II. Background
(i) The importance of investigating reaction time:
-Reaction time and execution of motor movements are closely correlated. These measures have been fundamental to the determination that information processing and decision-making occurs …show more content…
Reliability is the consistency of the experimental data. We can verify the results by testing for reproducibility. If the experiments are conducted correctly in a same way, they must produce similar results. Thus we can test on it to figure out if there are any possible mistakes. Beside, repeated trials can also repeated to give more data for analysis.
(ii) Why do we need to complete checks on the data (identify errors etc)?
To ensure the validity of the test. Validity is the absence of bias. There are three types of error in this reaction time test, namely direction error, anticipation error and timing error.
-Direction error means that the reacting movement is not on the same side as the target. Such na unstandardized response can’t truly reflect the actual reaction time. -Anticipation error happens when the reaction time is below 100msec, which may indicate that the performer is not reacting upon the appearance of stimulus, but initiate reaction prior to the stimulus.
-Timing Error means that the reaction time exceed 1000msec. This may be due to other issues in the experiment, such as participants actually not answering the question.
(iii) Why was there a variable fore-period between the start of a trial and the appearance of a stimulus in the