Research is the systematic method of finding out what is out there
Research Process
1. Identifying a Problem
2. Reviewing Literature
3. Specifying Purpose
4. CollectingData
5. Analyzing and Interpreting Data
6. Reporting Research
Areas of Psychological Research
Psychobiology
Cognition
Human Development
Social Psychology
Psychotherapy
Ways of Finding Out
Surveys and census
Images and drawings
Experiments
Lived Experiences
Interviews
Documents
Daily life
Sources of Knowledge
Superstition
Intuition
Authority
Tenacity
Rationalism
Empiricism
Science
Goals of Science
Description
Explanation
Prediction
Control
Reviewing the Literature
1. Selecting the Problem
2. Literature Review
3. Library Research
4. Journals
Abstract
A brief description of the entire paper that typically discusses each section of the paper (Introduction, Method, Results, and Discussion)
Introduction
It has three basic components: an introduction to the problem under study; a review of relevant previous research; and the purpose and rationale for the study
Method
It is generally divided into Subjects (or Participants), Materials (or Apparatus), and Procedure subsections
Results
It summarizes the data collected and the type of statistic(s) used to analyze the data
Discussion
The results are evaluated and interpreted
Ethical Standards in Human Participants
Informed Consent
Informed Assent
Risks
Deception
Debriefing
Statistics
A branch of mathematics that involves the data collection, analysis, and presentation
Research and Statistics in Psychology
Organize Data
Describe Data
Make inferences based upon data
Population
The entire group of individuals that the researcher wants to study
Sample
A small group of individuals selected from a population, usually picked to describe the population
Variable
A characteristic or condition that is not constant - it can change or has different values for different individuals
Levels of Measurement
Nominal
Ordinal
Interval
Ratio
Two Categories of Statistics
Descriptive Statistics
Inferential Statistics
Probability Sampling
Simple Random Sampling
Stratified Random Sample
Cluster random sample
Non-Probability Sampling
Convenience Sample
Purposive Sample
Quota Sample
Snowball Sampling
Frequency distributions are a way of presenting data that makes the pattern of the data easier to see
ClassInterval Frequency
Individual scores are combined into categories, or intervals, and then listed along with the frequency with which each interval occurs
Snowball sampling
A sampling technique in which existing subjects provide referrals to recruit samples required for a research study
Frequency distributions are used to illustrate the processes of organizing and describing data
Frequency distributions make the pattern of the data easier to see
After the scores are ordered, the data can be condensed into a frequency distribution - a table in which all of the scores are listed along with the frequency with which each occurs
The relative frequency is the proportion of the total observations included in each score
Class interval frequency
Individual scores are combined into categories, or intervals, and then listed along with the frequency scores in each interval
A rule of thumb when creating class intervals is to have between 10 and 20 categories
Calculating class interval width
Subtract the lowest score from the highest score and then divide the result by the number of intervals you want
Types of graphs used to display distributions
Bar graphs
Pie charts
Line graphs
Histogram
Stem plot or stem and leaf plot
Descriptive statistics
Numerical measures that describe a distribution by providing information on the central tendency of the distribution, the width of the distribution, and the distribution's shape
Measures of central tendency
Representative numbers that characterize the "middleness" of an entire set of data (mean, median, mode)
Mean
The most commonly used measure of central tendency, calculated by adding all the scores together and dividing by the total number of scores
Median
Used when the mean may not be representative of the distribution
Mode
The score in a distribution that occurs with the greatest frequency
Skewed distribution
Distributions in which the mean, median and mode are located in predictably different positions
Positively skewed distribution
The peak is to the left of the center point, and the tail extends toward the right