Mental Rotation of Images

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.

A total of 59 participants took part in this experiment. They were split into two independent experimental groups, one being the control group, and the other the experimental group. There were 30 participants in the control group, and 29 participants in the experimental group. The male to female ratio was fairly equal with

1. Form hypothesis: Do you think you will react more quickly to sights or sounds? Explain why.

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.

Ullsperger, Bylsma, and Botvinick (2005) investigated whether the findings of Mayr, Awh, and Laurey (2003) can be replicated and how much they can be shown across different task performances. Their specific study was motivated by a prior experiment where Gratton, Coles, and Donchin (1992) found that after an incompatible type trial reaction times were reduced and target processing occurred more frequently than flanker processing on the next trial. Botvinick, Braver, Barch, Carter, and Cohen (2001) believed that this follows the conflict monitoring hypothesis where incompatible trials involve a conflict with the response leading to greater top-down information processing (Botvinick, Nystrom, Fissell, Carter, & Cohen, 1999). However, Mayr et. al (2003) argued that the congruency sequence effect found by Gratton et al. (1992) was due to repetition priming because of stimulus repeats in a flanker task. This may have led to a faster reaction time with repeated trials. Mayr et al. (2003) used two experiments to present evidence for their argument. Both experiments failed to show the effect found by Gratton et al. (1992) when target and stimulus items did not repeat from trial to trial.

The Stroop experiment by J. Ridley Stroop in 1935 was performed in order to analyze the reaction time of participant’s stimuli and desired results while also obtaining a collective result of color interference and word reading(Stroop, 1935; Lee & Chan, 2000). In the experiment three forms of the test were given, the first consisting of color patches, the second had the color words printed in black and the other was an incongruent test beaming the color did not match the color word

This was achieved by presenting central cues, indicating the position of the target letter thus increasing focus. Through these experiments they found that when a subject is in a diffuse attention state (unfocussed) SOD do cause attentional capture and increase reaction time. However, if the subject was presented with a cue this same increase in reaction time was not observed. This led them to conclude that attentional capture from SOD is not automatic and instead propose a priority based visual attention system. In 2006 Neo and Chua conducted research which built upon Yantis and Jonides’ to further demonstrate effects of attentional capture on reaction time. They investigated whether sporadic use of the SOD increased the effect of attentional capture as well as investigated whether maintaining the same position for the target letter decreased reaction times. They found that SOD attentional capture did affect reaction times and unlike in Yantis and Jonides’ experiment they concluded SOD did trigger an automaticity response when used

The two independent variables were luminant cue patches (light cue, dark cue and equiluminant cue) and location of the cue and target (valid side with cue and target on same side and invalid side with cue and target on opposite sides). The dependent variable was participants’ reaction time in millisecond.

ABSTRACT: This investigation entailed the study of wether gender will affect the reaction times when tested. The average visual reaction time for a human is 0.25 seconds (250 milliseconds) and the average touch reception is 0.15 seconds (150 milliseconds), adding both these figures gives and estimated group time of 0.40 seconds (400 milliseconds). The average reaction speed for the boys was 342 and the average reaction speed for the girls was 392, in relation to average reaction speed these results are quite accurate as the age bracket was younger and smaller than the expected averages for humans.This investigation is well related to society as the measurement of visual reaction time has been used to evaluate the processing speed of Central Nervous System and the co-ordination between the sensory and motor systems, when shown a visual stimulus.

Reaction time from the congruent trial (e.g., counting +’s) and incongruent trial (e.g., counting number of incongruent digits) were subtracted from baseline trial (e.g., naming numbers), with the objective of establishing a true reaction time effect. There was a significant difference between participants congruent reaction time (M=1.71, SD=1.78) and incongruent reaction time (M=7.61, SD=3.10) , t(61)=18.80, p < .001.

In this experiment there was a total of 23 college student participants, with 15 females and eight males. Age varied between participants, ranging from 19 to 30 years old, with a mean of 22 years old and a standard deviation of 2.3 years. Participants were of different ethnicities as well, with four Whites, six Blacks, seven Hispanics, four Asians, and two Others. The compensation for all participants was course credit.

The reaction time (RT) of students was measured in the experiment to determine whether light or sound stimulus initiates a quicker response time. The question of whether or not RT was related to movement time (MT) was also challenged. Each student performed two test in random order; one testing the reaction time of a red light stimulus, or visual reaction time (VRT); and the other testing the reaction time of a “beeping” sound stimulus, or auditory reaction time (ART). The student completed the VRT trial by simply receiving the stimulus and pressing a button. The student placing and holding their hand on a button starts the ART trial. Once the student receives the stimulus (beep) they press the adjacent button as fast as they can. The ART trial does not only include the data of the RT, but also the data from the MT. Having previous knowledge that light travels faster than sound; one can predict that VRT is faster than ART. The prediction that MT is independent upon RT can be made with the thought that there are so many opposing variables that could affect the MT of an individual unrelated RT such as old age

We are replicating J.R. Stroop’s original experiment The Stroop Effect (Stroop, 1935). The aim of the study was to understand how automatic processing interferes with attempts to attend to sensory information. The independent variable of our experiment was the three conditions, the congruent words, the incongruent words, and the colored squares, and the dependent variable was the time that it took participants to state the ink color of the list of words in each condition. We used repeated measures for the experiment in order to avoid influence of extraneous variables. The participants were 16-17 years of age from Garland High School. The participants will be timed on how long it takes them to say the color of the squares and the color of the words. The research was conducted in the Math Studies class. The participants were aged 16-17 and were students at Garland High School. The results showed that participants took the most time with the incongruent words.

To find out what happens to a subject’s reaction time when different independent variables are applied.