A Study On Visual Illusion

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

Primates are one of the most interesting mammals on earth, not only because of their complex social structures, but because they hold so many similar characteristics to humans. Primates are often cited as our closest living relatives and on two separate occasions I observed four separate species of primates at the San Diego Zoo that can justify their use of their physical characteristics and behaviors that may be similar as well as different to the other primates and ours.

Suppose another experiment had participants say the word “now” as soon as they detected the green circle, and that the response times were between 100 and 200 milliseconds. What would you conclude about the cognitive tasks involved in these two versions of simple detection?

One study attempted to observe capuchin monkey’s ability to recognize cause and effect relationship in regards to tool use. An article in the international journal or primatology by Anthea Lavallee, describes the tests she conducted in a captive naturalistic environment on capuchin monkeys, as she writes, “I tested tufted capuchins' ability to conceive solutions to a probing task in a naturalistic captive setting” . The results showed at 3 out of the 5 capuchin monkeys displayed an ability to make and use tools that were presented to them from a wide variety of natural materials presented. Another study on the manipulation and tool use in captive yellow breasted capuchin monkeys was published in the “International Journal of Comparative Psychology” . This experiment consisted of six capuchin monkeys, who were placed in an environment where their tool using was tested and observed. The tools that were made available to the monkeys were transparent 9mm Plexiglas boxes with 3mm Plexiglas lids as well as different size stones. A piece of food was then placed into the box with the stones next to it and left for the capuchins. Each test subject was left isolated with the tools and box from the other test subjects, the subjects where successful if they used the stones to try and

This experiment in my opinion was useful to psychology. But I don’t agree with the methods that were applied. The researchers taught some behaviours to the monkeys that unless humans never show them how to do they will never do it by themselves, like

A Rorschach stimuli can be generated by dropping ink on a piece of paper and folding it in the middle, but still the cards were not random but selected out of thousands that H. Rorschach created. The test consists five black and white symmetrical inkblots with different shades of gray, two black/gray with red stains, and three multicolored. Each inkblot is printed on a separate white card, approximately 18x24 cm in size (Kaplan, & Saccuzzo, 2008).

This paper aims to study the traits of non-human primates. By observing two types of primates including Common Squirrel Monkey (Saimiri sciureus) and Western Gorillas (Gorilla Gorillas), I try to find out their characteristics, pattern of their behavior, and differences between these two primate species. Especially, characteristics and behavior such as social interaction, food acquisition and intelligence will be discussed and compared in this paper. In order to enhance the persuasiveness of my observation, I recorded and examined at least 25 distinct characteristics of both Common Squirrel Monkeys and Western Gorillas. It is also helpful for me to compare these two primates. Apart from exploring the primates’ traits and differentiation between them, this paper will discuss the effects of captivity. How being in captivity and on display in a zoo would influence their behaviors and emotions? The observation was a great success and I have successfully derived with a hypothesis base on our observing data. The ultimate goal of this paper is arousing humans’ awareness of the importance of studying primates.

In a quiet college classroom, participants were individually tested, with a seat positioned in view of a computer, and a seat on the side for the experimenter to sit. There were four tasks for the participants to complete, that were timed. The participants were told that if they were to make an error by naming the wrong color, to correct it and read the next color, as the experimenter would write how many errors

claim is based on a study of the rehus monkey by Dr. Robert Heath in the late

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 experiment used the same red and green stimuli in each trial instead of other opponent colors such as black and white or blue and yellow. The small sample size studied could have also lead to random variation in the results.

5-CSRT task training occurred in a manner similar to what has previously been described [25]. Briefly, rats were trained to touch the location of an illuminated white square that is presented at 1 of 5 locations on a Bussey-Saksida capacitive touchscreen system (Lafayette Instrument Company; Lafayette, IN USA). If a capacitive screen touch occurred at the illuminated location during or up to 1sec after stimulus presentation a sugar pellet was delivered in the reward receptacle located across the chamber from the touch screen. Training occurred in stages where the duration of the light stimulus was slowly decreased from 32 to 1sec by halving the stimulus duration across sessions once criterion performance was met, which was approximately 80% accurate trials and less than 20% of trials omissions. Rats that were unable to reach performance criterion at 1sec were excluded from the analysis of the 5-CSRT task performance. Analysis of these data was performed with custom routines written in the R statistical programming environment

The stimulus sizes (and critical feature sizes) calculated and used for the eccentricities 0˚, 20˚, 40˚ and 60˚ were 0.9cm (0.18cm), 2.2cm (0.44cm), 6.13cm (1.23cm) and 17.5cm (3.5cm) respectively.

The experiment consisted of 6 trials that contained words such as: sleep, bed, tired etc. The participants were asked to look at the rectangle on the screen before starting the trials. In the first trial, the participants were asked to press the “start trial” button because a fixation dot would appear in the middle of the screen. The participants were asked to stare at the computer until a sequence of words appeared, with each word was presented for one second. After a full sequence was presented, a set of buttons were shown, each labeled with a word. Some the words were on the list, and some were not. The participant’s task was to click or tap on the buttons to indicate which words were in the sequence. The sequence of words consisted of the actual words shown or related or unrelated words. For example, some trials consisted of all sleep related content to see if the participant would select items that were related or select items that were not in the sequence. After identifying the words that were shown in the sequence, they would receive feedback on the accuracy of their memory. After the participants were done

Tester provides an inexpensive Means to access activity level and attention capacity. The subjects task is to hold the stylus in nine different holes of diminishing size without touching the sides or base plate. Tester is fitted with a Fault counter. An audible tone and visual red indicator responses and provide immediate feed-back of performance.