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Chapter 4
Test 2
50
Psychology
Undergraduate 2
01/30/2013

Additional Psychology Flashcards

 


 

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Term
Brain plasticity
Definition
The capacity of various parts of the cerebral cortex to take over functions of damaged regions. Declines as hemispheres of the cerebral cortex lateralize
Term
Cerebral Cortex
Definition
The largest, most complex structure of the human brain, containing the greatest number of neurons and synapses,
Term
Contrast Sensitivity
Definition
A general principle accounting for early pattern preferences, which states that if babies can detect a difference in contrast between two patterns, they will prefer the one with more contrast
Term
Differentiation theory
Definition
The view that perceptual development involves the detection of increasingly fine-grained invariant features in the environment
Term
Dynamic Systems Theory of Motor Development
Definition
Views new motor skills as reorganizations of previously mastered skills. Each new skill is a joint product of central nervous system development, the body's movement possibilities, environmental supports for the skill, and the child's goal.
Term
Experience-dependent brain growth
Definition
Growth and refinement of established brain structures as a result of specific learning experiences that vary widely across individuals and cultures.
Term
Glial Cells
Definition
Cells that are responsible for myelination of neural fibers, improving the efficiency of message transfer
Term
Habituation
Definition
A gradual reduction in the strength of a response due to repetitive stimulation
Term
Intermodal Perception
Definition
Perception that combines information from more than one sensory system
Term
Kwashiorkor
Definition
Disease caused by a diet low in protein (1-3 years usually) Symptoms include an enlarged belly, swollen feet, hair loss, skin rash, and irritable behavior.
Term
Lateralization
Definition
Specialization of functions in the two hemispheres of the cerebral cortex
Term
Marasmus
Definition
Disease caused by malnutrition and leads to a wasted condition of the body
Term
Mirror neurons
Definition
Specialized cells in motor areas of the cerebral cortex in primates that underlie the ability to imitate by firing identically when a primate hears or sees an action and when it carries out the action on its own
Term
Myelination
Definition
The coating of neural fibers with an insulating fatty sheath (myelin) that improves the efficiency of message transfer
Term
Neuron
Definition
Nerve cells that store and transmit information
Term
Neurotransmitters
Definition
Chemicals released by neurons that cross the synapse to send messages to other neurons
Term
Nonorganic failure to thrive
Definition
A growth disorder (by 18 mos) that is caused by lack of affection and stimulation. Affected infants show signs of marasmus.
Term
Operant conditioning
Definition
A form of learning in which a spontaneous behavior is followed by a stimulus that changes the probability that the behavior will occur again
Term
Punishment
Definition
In operant conditioning, removal of a desirable stimulus or presentation of an unpleasant stimulus
Term
Recovery
Definition
Following habituation, an increase in responsiveness to a new stimulus
Term
Reinforcer
Definition
In operant conditioning, a stimulus that increases the occurrence of a response
Term
Statistical learning capacity
Definition
Infants' ability to analyze the speech stream for regularly occurring sound sequences, through which they acquire a stock of speech structures for which they will later have a meaning
Term
Synapses
Definition
The gaps between neurons, across which chemical messages are sent
Term
Synaptic pruning
Definition
loss of synapses by seldom-stimulated neurons, thereby returning them to an uncommitted state so they can support future development.
Term
How much height do babies gain from birth to age 1?
Definition
50%
Term
How much height do babies gain from birth to age 2?
Definition
75%
Term
5 Methods for Measuring Brain Functioning
Definition
EEG

ERP

fMRI

PET

NIROT
Term
Electroencephalogram (EEG)
Definition
Electrodes are attached to the scalp to record electrical brain-wave activity in the cerebral cortex
Term
Event-related potentials (ERPs)
Definition
Using the EEG, the frequency and amplitude of brain waves in response to particular stimuli are recorded in the cerebral cortex.

Enables identification of general regions of stimulus-induced activity
Term
Functional magnetic resonance imaging (fMRI)
Definition
White the person lies inside a tunnel-shaped apparatus that creates a magnetic field, a scanner detects increased blood flow and oxygen metabolism in areas of the brain.
Term
Positron Emission Tomography (PET)
Definition
After injection/inhalation of a radioactive substance, the person lies inside an apparatus with a scanner that emits fine streams of x-rays which detect increased blood flow, and oxygen metabolism in areas of the brain.
Term
Near-Infrared Optical Topography (NIROT)
Definition
Using optical fibers attached to the scalp, light is beamed at the brain; its absorption by areas of the cerebral cortex varies with changes in blood flow and oxygen metabolism.
Term
Left Hemisphere (4)
Definition
Sensory information and control of the right side of the body

Verbal abilities

Positive emotion

Sequential, analytical processing
Term
Right Hemisphere (4)
Definition
Sensory information and control of the left side of the body

Spatial abilities

Negative emotion

Holistic, integrative processing
Term
When does sleep move to an adult-like night-day schedule?
Definition
During the first year
Term
When do sleep needs decline from 18 to 12 hours?
Definition
Age 2
Term
4 Influences on Early Growth
Definition
Heredity

Nutrition

Malnutrition

Emotional well being
Term
Food insecurity
Definition
Uncertain access to enough food for a healthy, active life
Term
4 milestones of reaching and grasping
Definition
Prereaching

Reaching

Ulnar grasp

Pincer grasp
Term
Ulnar grasp
Definition
Adjust grip to object

Move objects from hand to hand
Term
Hearing from 4-7 months
Definition
Sense of musical phrasing
Term
Hearing from 6-8 months
Definition
"Screen out" sounds from non-native languages
Term
Hearing from 7-9 months
Definition
Recognize familiar words, natural phrasing in native language
Term
Vision improvements at 2 months
Definition
Focus and color vision
Term
Vision improvements at 6 months
Definition
Acuity, scanning, and tracking
Term
Vision improvements from 6-7 months
Definition
depth perception
Term
Face Perception 2-4 months
Definition
Prefer complex facial pattern to other complex patterns

Can distinguish strange from familiar faces

Prefer mother's face over stranger
Term
Face perception 5-12 months
Definition
Can perceive emotional expressions on faces
Term
Intermodal Perception 3-4 months
Definition
Relate speech sounds to lip movement
Term
Intermodal Perception 4-6 months
Definition
Perceive unique face-voice pairings of unfamiliar adults
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