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[PSYB07H3] - Midterm Exam Guide - Ultimate 67 pages long Study Guide!


Department
Psychology
Course Code
PSYB07H3
Professor
Dwayne Pare
Study Guide
Midterm

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UTSC
PSYB07H3
MIDTERM EXAM
STUDY GUIDE

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

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September 14, 2016
PSYB07 – LECTURE #2 – BASIC CONCEPTS
Lecture #2 Basic Concepts
Math Review
- Order of Operations
- “BEDMAS”
oBrackets (left to right)
oExponents (left to right)
oDivision & Multiplication (left to right)
oAddition & Subtraction (left to right)
Population vs. Sample
- Population
oEntire collection of events in which you are interested
- Sample
oA subset of the population
- Example:
oThe entire class = population
o1 Tutorial = sample of my population
- A population can also be a sample
- Example:
oLet’s say I’m in the car with three of my friends, and we are trying to decide
where to go for dinner.
Korean barbecue?
Tim, Jess, and Sijina (Dwayne is driving)
oThe population = tim, jess, sijina, Dwayne
oSample = everyone because they are all making the
decision
oHow representative is the sample of the population
Tim, Jess and Sijina, are on a bus and bus driver asks those 3
people what they want to eat
oThe population = the bus
oSample = Tim, Jess, Sijing
oHarder time saying these 3 people are a representation of
the population
Descriptive vs. Inferential Statistics
-Descriptive statistics describe a data set
oCan be calculated for a population or a sample
oCalculating statistics or parameters
Parameter = when the descriptive describe the population
Example – average age of the population
oTaking the data at hand and finding a way to describe it
-Inferential statistics make conclusions about populations from samples
1
(2 -4)2
2
+(4
=(-2)2
+(0
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September 14, 2016
PSYB07 – LECTURE #2 – BASIC CONCEPTS
oEstimating population parameters using sample statistics
- Need to find out where statistics actual represent parameters
Population vs. Sample
- Descriptive statistics
oSample
oStatistics
- Inferential statistics
oSample à Population
oStatistics à Parameters
- Representative?
oExternal validity
The degree to which the sample reflects the population
Our sample is reflective of our population
Example: Trump went to all white institution to talk about black
rights – this is not externally valid because you are not
representing the group at hand
Example: How we address the American health system and
looking at one ethnic group – that is not representative
oSample size
Taking 3 people and hoping it represents 70 people would be an issue
oRandom sampling
Every member in the population has an equal chance of being selected
Ensures external validity
- First-person shooter game and Spatial attention
oDoes the first person shooter games effect spatial attention?
oLook at the Useful Field of View (UFOV)
Without moving your head, what info can you get from that scene very
quickly
Video gamers have a better UFOV because they’re used to it (used to
adapting and used to not moving and just looking directly at the screen)
- Intro to psych students -> external validity?
- Gamers vs Non-gamers
- Performance on UFOV task (accuracy)
- Spatial attention
oGamers vs Non-game
oMale vs Female
-Internal validity
oThe degree to which an experiment measures what it is supposed to
2
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