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Lecture 6

Lecture 6 - Sensation & Perception (Oct. 2).docx

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Richard Ennis

Psychology 101: Sensation and Perception (Tuesday, October 2, 2012) *[Read Sensation and Perception – Biological Part in the Textbook]  Sensation is the process is which we take in the world around us o Detecting the source and interpreting it in our brain  Physical sensing of the environment. For the vast majority, it is a physiology concept  Physiological Processes  Relatively objective  Learning and experience are not required  Ex. Chalk on board  And perception is what we do with that information in our brain o It is unique and different, and what we depend on  Mental interpretation of environment  Psychological processes  Relatively subjective (Your own influences)  Dependent on learning and experience  Ex. Words on board  Sensory Perceptions: [*Note] Thalamus (Within the brain) – Relay centre of the brain for sensory input and out put. Neurons are sending messages to the thalamus, and it detects light and vision information, sending it into parts of our brain that invoke our sensory perceptions. This process is called transduction. This allows the perceptual process, changing the energy type.  Vision – Light waves are seen and then go through the brain through the thalamus  Sound (Important Sensory) – A wave sensation. o Sending auditory information into the temporal lobe, in which the brain interprets learning and education. Sounds are sent into the thalamus, which directs information to different parts of the brain  Olfaction (Smell) – Dendrites sense molecular shapes in the air, detecting and binding the smell through the mucous membrane of nose, going into the olfactory nerve o Exception: This does not go through the thalamus, going through other parts of the limbic system, like the amygdala, hippocampus, etc. o Animalistic instinct/emotion – can invoke different emotions (E.g. The smell of French fries, the smell of a loved one). It is a primitive sense o Humans, though have the worst sense of smell o Subliminal Perception – It doesn’t influence behaviour though o Might be the one perception that can motivate and maybe change our behaviour since it is most connected to the limbic system. Slight subliminal perception factor included.  Ex. Smell of leather can influence shopping behaviour – buy more  Uses limbic system, instead of just thallium and cerebellum  Gustation (Taste) – Shape of molecules get dissolved in the salvia through tongue, and that goes through the thalamus  Tactile (Touch) – Refers to touch and temperate, in which there are sensory neurons in skin. Tips of fingers have the most senses  *Kinaesthetic (Deals with the body) – Detecting information from our body and interpreting it o Used for pressure and strain within the joints, muscles, tendons o Sensory neurons > Spinal nerves > Cerebellum (Small brain – deals with meteoric function, dealing with most rehearsed or routinely functions. Ex. Showering, brushing your teeth, driving your car. You do it without thinking very much – allowing your mind to wander.)  *Vestibular (Deals with motion- knowing where your position is, and your balance) o Semicircular > Cerebellum  Extra-Sensory Perception (ESP): “Defined as the experience or response to a target object, state, event or influence without sensory contact.” – Frank Gilovich  Categories of Psychic Phenomenon o Telepathy: The direct communication between one mind and another through the use of psi o Clairvoyance: The direct mental perception of a state of physical affairs. (Ex. Knowing an accident is occurring right now, telling that the stock market is down right now) o Precognition: Accurate prediction of future events (Ex. RIM productions going up in the future in 2018, doing well on psych mid-term in two weeks) o Psychoki
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