Research Methods: Validity, Reliability, and Experimental Design
*Valid logic: True premises always lead to a true conclusion. Sound logic: The argument is valid and all of the premises are true
Hypotheses:
Directional alternative hypothesis: –
Group 1 will perform better than Group 2 -As X goes up, so does Y -As X goes up, Y goes down
Causal or Associative Hypotheses — –
Some attempt to define a causal relationship -The experimenter must be in control of the cause -“If I change X, then I think that Y will also change” …-Co-Occurrence: -The presumed cause
Capacitor and Circuit Problems: Solutions and Analysis
Problem 1: Spherical Capacitor
A spherical capacitor consists of a thin conducting shell of radius a, surrounded by a thin conducting shell of radius b (where b > a). When the capacitor is connected to a battery, the inner shell has charge +Q and the outer shell has charge –Q.
(a) Let r denote the distance from the center of the shells. Use Gauss’s law to find a symbolic expression for the electric field between the shells.
(b) Find a symbolic expression for the magnitude of the potential difference
Read MoreEconometrics: Regression Analysis and the Classical Assumptions
Econometrics, literally “economic measurement,” is a branch of economics that attempts to quantify theoretical relationships. Regression analysis is only one of the techniques used in econometrics, but it is by far the most frequently used.
Major Uses of Econometrics
- Description
- Hypothesis testing
- Forecasting
The specific econometric techniques employed may vary depending on the use of the research.
Regression Analysis and Causality
While regression analysis specifies that a dependent variable is a
Read MoreAircraft Weight, Balance, and Flight Operations Procedures
Center of Gravity Computation
Fig 76, 79, and 80: WT1(B) WT2(C) WT3(A) WT4(A) WT5(B)
Fig 77, 79, and 80: WT6(C) WT7(C) WT8(C) WT9(A) WT10(C)
Fig 78, 79, and 80: WT11(C) WT12(B) WT13(A) WT14(B) WT15(A)
Stabilizer Trim Setting
Fig 45, 46, and 47: A1(A) A2(B) A3(C) A4(A) A5(C)
Fig 53 and 55: R1(C) R2(C) R3(A) R4(B) R5(C)
Fig 81 and 83: G1(B) G2(A) G3(C) G4(C) G5(B)
Changing Loading Conditions
Fig 44: WS1(A)27.1 WS2(C)+12.13 WS3(B)14.3 WS4(B)+8.50 WS5(A)31.9
Fig 44: WS1(B)29.8 WS2(C)22.8 WS3(A)29.2 WS4(B)
Key Concepts in Psychology: Quizzes and Insights
Quiz #1: History of Psychology
The English translation for the Greek word psyche is the soul. The practice of introspection involves someone examining their own conscious experience as objectively as possible. School of psyche description: Structuralism was the first school to focus on breaking down mental processes into the most basic components. The basic elements of consciousness using methods known as introspection and internal perception. Functionalism was an early school of thought that focused
Read MoreSocial Psychology: Methods, Attribution, and Attitudes
Methods
Social psychology is an empirical science that attempts to answer questions about human behavior by testing hypotheses, both in the laboratory and in the field. Careful attention to sampling, research design, and statistical analysis is important. Results are published in peer-reviewed journals such as the Journal of Experimental Social Psychology, Personality and Social Psychology Bulletin, and the Journal of Personality and Social Psychology. Social psychology studies also appear in general
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