1 Flashcards
Interaction
the effect of one variable depends on the other variable
Experimentation PROS
experimental control: can test for causal relationships
Experimentation CONS
- demand characteristics
- generalizability
Demand characteristics
knowing you are in an experiment can change behavior
Generalizability
experimental situations are often artificial, so they might not apply well to every-day life
Confounding variable
an unmeasured 3rd variable that influences both the supposed cause and effect which can make it seem like there is a causal relationship when there is not
Eye Movements
- excellent timing information
- useful for studies of natural behavior
- no extra task required
Measuring brain electrical activity (EEG, ERPs)
- excellent timing information
- no extra task required
- shows what happens between input and output
Magnetic Resonance Imaging
- uses magnetic field to scan tissue in real time
fMRI
- measures levels of O2 in blood
- good spatial information
- can tell us if two processes are similar or different
- poor timing information
Neuropsychology
- examine performance of patients with naturally occurring brain damage
- if patients perform poorly on a cognitive task you can assume that the damaged tissue is normally involved
Methods for studying the brain that have high temporal resolution tell us ____ activity is occurring; methods with high spatial resolution tell us ____ activity is occurring
when ; where
Any experiment will, by necessity, involve a compromise between
generalizability and control
A researcher decides to study the shopping habits of local residents. He goes to the local supermarket and (1) makes a note of what kinds of food people buy, and (2) gives these people a brief survey to assess how healthy they are. After analyzing his data, the researcher concludes that people who buy mainly fruit are healthier than those who buy mainly donuts. Assuming that people eat what they buy, what can we conclude from the data?
healthier people tend to eat more fruit than donuts
According to the information processing approach, mental processing can be viewed as _____; while the brain can be viewed as _____.
the “software” of a computer; the computer’s “hardware”.
Another name for parallel distributed processing is
Connectionism
Janet drank from a jug marked “apple cider.” However, she spit the liquid out when she figured out that the jug contained coffee. Janet likes coffee, so why did she spit it out? It’s likely this is the result of
top-down processing
The process that begins with an image being created on the retina, moves on to converting the input into nerve signals, and then passing this information to the brain for further processing is _____ processing
bottom-up
A friend tells you that he needs a new “jair”. But, because you’re talking about his office, you barely notice and hear the word “chair”. This is an example of:
using the topic of conversation as context for disambiguation