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51 Cards in this Set

  • Front
  • Back

Psychological Science

the science dealing with the mind and mental processes, especially in relation to human and animal behavior.

Hindsight Bias

The tendency for people to exaggerate how much they could have predicted an outcome after knowing that it occurred.

Example of Hindsight Bias

Two outcome: A or B


People vote A but then later B won


Then people say, "oh, I knew that was going to happen"

_____________ can be contradictory.

Common sense

What kind of explanation that is used for any conclusion and its opposite?

"commonsensical explanation"

What are some problems of common sense?

- common sense is based on private, careless observation, or upon wholly non-empirical bases (stereotypes)


The RATIONALE of a lime green vs. red fire truck:

- perceptual psychologists discovery that the human visual system is most sensitive to light with wave lengths between 510-570nm.

The INNOVATION of fire trucks:

Lime green fire truck vs. Red fire truck

The RESULT of lime vs. red fire trucks:

Lime green fire trucks are more than 3 times less likely to be in a traffic accident than red fire trucks.

How do pshycologists ask and answer questions?

1. Generate research question


2. Establish operational definitions


3. Choose research design


Theory

an explanation using an intergrated set of principles that organizes observations

Hypothesis

a testable prediction implied by a theory.

Research process example of scientific method:

-might theorize the cause of depression is low self esteem


-might hypothesize that depression & self esteem will correlate negatively


-might test this hypothesis by seeing if ppl who receive a low score for self-esteem end to receive a high score for depression

Research process example of scientific method of low self esteem & depression:

1. Theories: low self-esteem feeds depression


2. Hypotheses: ppl with low self esteem will score higher on a depression scale


3. Research & Observation: administer tests of self esteem and depression. See if a low score on one predicts a high score on other.

Simple observation:

one source of research questions psychology is simply observing the world around you and asking questions about why people think and behave as they do.

Example of simple observation:

Darley & Bibb Lantane horrified by brutal murder of Kitty Genovese. Dozens neighbors witnessed attack of rape but "no one helped."

Darley and Latane hypothesis that ...

any given bystander is less likely to give aid to a victim if other bystanders are present. (if people around, they think they will help so dont do anything)

What can be answered through objective observations?

Research or empirical questions.

Ignaz Semmelweis

Vienna General Hospital: large amount women dying who gave birth in 1st clinic vs. 2nd clinic. Turn out that grad students didnt wash hands with soap.

Serendipity

Act of discovering something while looking for something else entirely. OR making fortunate discoveries by accident.

Replication

seeing whether a basic finding can be observed again with different participants and under different circumstances. (follow up studies)

Operational defnition

a specific statement of the procedures used to define research variables, so as to allow others to replicate the original observations.

Example operational definition of intelligence:

might be the number correct on tests of verbal, spatial, numerical, and reasoning abilities.

3 major types of research design methods that psychologists use in their research:

1. descriptive


2. correlational


3. experimental

Descriptive Methods components (3):

1. The case study


2. The Survey


3. Naturalistic Observation

Descriptive methods - "the case study"

- in depth investigation of single (or very few) subjects/participants

Descriptive methods - "the survey"

-an investigation of many cases in less depth by asking ppl to report opinions and behaviors


-technique for the self reported attitudes, opinions, behaviors of ppl usually done by questioning

Descriptive methods - "naturalistic observation"

recording behavior in its natural environments, and describing it in details

Example of naturalistic observation:

people laugh/smile more when with social group than alone (observation depending in environment)

Experimental Methods variables (3):

1. Independent Variable


2. Dependent Variable


3. Control Variable

Independent variable

-var. is manipulated


-factor being studied to see if itll influence behavior


-could be called group variables


(studying people)

Dependent variable

-var is measured by experimenter


-dv depends upon the independent variable


-outcome variable

Control variable

-held constant during an experiment


(ex: temperature, time of day)

Purpose of experimental methods:

is to explore cause and effect by manipulating one or more factors, while holding other factors constant.

Random assignment to condition means

-that each participant has an equal chance of being in any particular condition


-conditions are independent of participant


-RA necessary to establish causuality in true experiment

Experimental Method example about breastfeeding children having an impact on their intelligence later in life? (INDIVIDUAL VAR.)

-IV: whether mothers are assigned to an experimental condition in which their children breast feed, or to a control condition in which they feed their children


Experimental Method example about breastfeeding children having an impact on their intelligence later in life? (DEPENDENT VAR.)

-DV: is children score on an intelligence test at age 8. (this is measureable aspect of psychological functioning that we think may be influenced by the independent variable)

Experimental Method example about breastfeeding children having an impact on their intelligence later in life? (Random Assignment)

assigning participants to experimental and control groups by chance, minimizing preexisting differences between the groups that could affect the dependent variable

Correlational methods

-purpose is to observe naturally occurring relationships between variables


-a relationship is established by finding the degree to which two variables covary

We want to know in a correlation method if...

two variables go up and down together or if one goes up while the other goes down.

Correlation coefficient

statistical index of the relationship between two variables (scatter plots to show neg. or pos. correlation)

Correlation is not

causation

Research Ethics (4)

1. Obtain informed consent


2. Protect them from harm


3. Maintain confidentiality


4. Debrief

The 3 R's for non-human research (ex. rats)

1. Replacement - use alternatives to animal research when possible


2. Refinement - minimize/eliminate animal destress


3. Reduction - emply designs/procedures tht require fewest # of animals possible

What usually misread reality and mislead public?

"off the head estimates"

Statistical reasoning in everyday life: the point to remember is...

Doubt big, round, undocumented numbers.

Describing data: (ex. bar graphs) the point to remember...

Think smart. When viewing figures in magazines and on tv, read the scale labels and note their ranges.

Measures of central tendency: (ex. mean, mode, median) the point to remember...

Always note which measure of central tendency is reported. If its a mean, consider whether a few atypical scores could be distorting it.

Measures of variation: (range, standard deviation, bell shape, normal curve) point to remeber...

How similar or diverse scores are.

When is a difference significant: the point to remember...

Statistical significance indicates the likelihood that a result will happen by chance. but this dont say anything about importance of result.

1. mode


2. mean


3. median


4. range


5. standard deviation


6. normal curve

1. most scores tallying in a distribution


2. average


3. the middle score


4. diff between highest & lowest scores


5. how much scores vary around mean score


6 bell shaped, symmetrical, scores fall near mean