Investigating The Statistical Properties Of An Individual 's Reaction Time When Tested With Audial And Visual Stimuli

In experiment 1, participants were instructed to press a key to determine if the stimulus was red, blue, yellow, or green. On the second half of the experiment, the stimulus appeared in grey with only one colored letter which was positioned randomly. Error rates for the experiment were below 2.5% for each condition, which is quite low. Experiment 2 was the same as experiment 1 except that there were 114 data collections instead of 288 and there were 36 practice trials instead of 72. According to experiment 1 and 2 it is suggested that the effect of

Following classical conditioning the data show a decrease in variability and in the latency between stimulus presentation and the response. There is also a change in trend from increasing to no trend.

2) Compute the standard deviation for each of the four samples. Does the assumption of .21 for the population standard deviation appear reasonable?

We know that +/- 1.96 standard deviations from the mean will contain 95% of the values. So, we can get the standard deviation by:

If the response time for this experiment by saying the word” now” falls between 100 and 200 milliseconds, I would conclude that

The lab uses the measurements of a wooden dowel in length and diameter to collect data in order to interpret data in report form. The data is used to produce statistical data and how to correctly present it. A ruler and micrometer were used to measure the dimensions. Spreadsheets are then constructed in order to generate standard deviation, mean, median, mode, frequency, as well as variation of length, diameter, volume, and cross sectional area of the

Let’s assume you have taken 1000 samples of size 64 each from a normally distributed population. Calculate the standard deviation of the sample means if the population’s variance is 49.

σAB = 0.3 × 0.07 × 0.14 + 0.4 × 0.06 × (−0.04) + 0.3 × (−0.08) × 0.08 − 0.021 × 0.05

The reaction timer from Maths Is Fun (2014) is specific to three decimal places. The accuracy of the chosen source reduces the risk of statistical measures being slightly greater or less than they would be if only one or two decimal places were provided. Unlike other reaction timers that are available online, this particular source requires the subject to complete five trials before the mean is calculated. Undertaking multiple trials will be vital to this investigation because if the subject was to anticipate the event or have one delayed response, the trials that follow would reveal such errors, therefore increasing the reliability of the results.

Pg 212 #14) A normal population has a mean of 12.2 and a standard deviation of 2.5.

The last experiment performed consisted of three naïve subjects being tested together. The independent variable, the number of people in the room and their awareness of the experiment, was varied in order to show how individuals react to the potential emergency alone and in the presence of others in order to test for any differences in reaction time between

The equipment used consisted of a 60 Hz monitor on a 19 – inch computer screen. The program for the test ran on a viglen Pentium 4.30 GHZ. To present the stimuli’s four

The trials for each of the six conditions were presented in a random order. The experimenter controlled for differences among participants by having them set their own equiluminant point for the cue stimuli and eliminated luminance differences by embedding the stimuli in a random luminance noise. The experimenter also controlled for outliers by eliminating response

The analysis of RTs (reaction time) and error are measured by Age X Target visual field. The resutls indicated that older adults had longer RTs toward the targets in the lower visual field (LVF) than the targets in the upper visual field (UVF). The RTs provided no evidence of interactions within the visual fields because the targets either appered in the UVF or in LVF. The targets were not present in both fields at the same time. The Rts had shorter redundent- target trials than the single-target trials because the processing time is determined how fast and quick the channel in each trial are. This effect is known as statistical faciliation. The redundant target reduce error rates, and displays with clutter had higher errror rates than the no-clutter display. Older adults showed more interaction of clutter than young children. However, there was no evidence of speed accuracy, but suprisingly the capacity appeared to be larger for older adults in clutered conditions and for targets farther in the retinal

Reaction Time, also known as Mental Chronometry is the amount of time that is takes the brain to respond to certain stimuli. There are different types of reaction time. Simple reaction time requires the subject to press a button when a stimulus appears. Recognition or reaction time tasks require that the subject press a button when one stimulus type appears and not respond when another stimulus type appears. For example, the subject might press the button when a green light appears and not press the button when a red light appears. Choice reaction time requires you to respond differently for each unique stimulus. For example, the subject would press a blue button if a blue light appeared and a yellow button if a yellow light appears. Discrimination