Facial Expression Categorization by Chimpanzees Using Standardized Essay

Facial Expression Categorization by Chimpanzees Using Standardized Stimuli - Essay ExampleFour experiments were conducted onchimpanzees using a invest of standardized, prototypical stimuli created using the newChimpFACS coding system.1) The first experiment was to determine whether chimpanzees could discriminate the3D facial expression figures in a MOT (matching-to-sample). It was a reproduction ofthe depicted object by study by Parr, Hopkins, et al. (1998)Procedure Data were collected on experimenting 6 male and female chimpanzees aged11 years and above. They were tested in their home cage. The calculating machine placed in anaudio visual cart was positioned about 30 cms from the cage and the eye of each animalwas about 40 cms from the computer. A joystick was attached jut 4 cms into themesh.The experiments conducted were 1) Initial Discrimination of Poser Stimuli 2)Inversion Effect for Facial expression 3) Examining Perceived Dissimilarity usingMultidimensional Scaling 4) Discr iminating Facial Expressions using ComponentMovement.Experiment 1The aim of this initial experiment was to verify whetherthe Poser facial expression stimuli were prominent for the subjects, and whether it couldbe discriminated at high levels of skill and that expressions were dealt with no evidentparent stimulus biases. The analysis showed that scream was the to the highest degree salientexpression to single out. In fact the subjects reached the final testing criteria for screamsin minimum time.Experiment 2Experiment 2 revealed a significant inversion effect suggesting a generalconfigural processing strategy for all expressions.Experiment 3Subjects pattern of error when differentiating all expressions. Apart from screams and pant-hoots showed much difference based on the identity of thefoil expression. They take the majority of their individual component movements, suchas the bared-teeth display, the presence of these similarities did little to confuseperformance. The MDS analysis provides a statistical interpretation of howexpressions were categorized based on their perceived dissimilarity.Experiment 4The results showed that for each facial expression, at least one component movement wasseen to