Health Promotion Evaluation Designs, Assessment Example

Pages: 1

Words: 258

Assessment

Week 8: Study Design and Internal Validity

1a. XT O2

1b. The internal validity issue with a single group post-test only is that it is a one-time survey following the intervention. Therefore, it cannot identify the changes which have have resulted between the baseline and the intervention. In addition, it does not contrast between groups. The test is only useful at providing a single snapshot of a group following an intervention which can be contrasted with standardized materials such as national data.

2a. Pre-test post-test control group design

2b. The threats to internal validity may result from only one group receiving the initial treatment while both groups are post-tested (no placebo). In addition, the design assumes the groups are not random but equivalent. This may produce type 2 beta error.

3a. O1 x O2

O3    O4

3b. The key threats to internal validity for this design are additive and interactive effects along with differential attrition and selection. This stems from a lack of random group placement which makes it suspect to decide that the post-test difference is a result of the intervention.

4a. One group pre-test post-test

4b. A number of issues affect the internal validity of this intervention. First, a number of things might happen between the two occurrences. Second, the effect of testing at the first occurrence may have influence the subject’s ad well as the measurer’s performance at the second occurrence.

5a. O1 x O2

O3 x O4

O5 x O6

O7

5b. This test is superior to the others, however similar to the one group pre-test post-test one must be concerned with history and measurement as confounding variables.

Time is precious

Time is precious

don’t waste it!

Get instant essay
writing help!
Get instant essay writing help!
Plagiarism-free guarantee

Plagiarism-free
guarantee

Privacy guarantee

Privacy
guarantee

Secure checkout

Secure
checkout

Money back guarantee

Money back
guarantee

Related Assessment Examples

Tests, Scales, Populations, Reliability, and Validity, Coursework Example

The validity and reliability of a study is reliant on numerous factors, specifically the population, the scale of measurement and type of the test. There [...]

Pages: 1

Words: 182

Coursework

Soybean Rust, Case Study Example

The problem of soybean rust was identified in the United States initially in November, 2004 (Aultman, 2010.) Since then, each state has been encouraged to [...]

Pages: 1

Words: 89

Case Study

Research Question, Essay Example

With the current, prolonged economic downturn led by the housing sector, the construction sector has experienced a substantial downturn.  Indeed, the downturn is not only [...]

Pages: 1

Words: 324

Essay

SOAP Note for Urinary Tract Infection, Essay Example

Chief Complaint Patient presents with mild fever, low back pain, and “burning” sensation while urinating for one week. Subjective The patient reports the burning sensation [...]

Pages: 1

Words: 153

Essay

Anxiety, Case Study Example

This is a case of a 47-year-old female social worker suffering from repeated episodes of clinical anxiety. In the background information given (which I won’t [...]

Pages: 1

Words: 211

Case Study

Major Depression, Case Study Example

Because there are many causes of depression, it is important to thoroughly evaluate a patient to determine if the mood disorder is precipitated by an [...]

Pages: 1

Words: 172

Case Study

Tests, Scales, Populations, Reliability, and Validity, Coursework Example

The validity and reliability of a study is reliant on numerous factors, specifically the population, the scale of measurement and type of the test. There [...]

Pages: 1

Words: 182

Coursework

Soybean Rust, Case Study Example

The problem of soybean rust was identified in the United States initially in November, 2004 (Aultman, 2010.) Since then, each state has been encouraged to [...]

Pages: 1

Words: 89

Case Study

Research Question, Essay Example

With the current, prolonged economic downturn led by the housing sector, the construction sector has experienced a substantial downturn.  Indeed, the downturn is not only [...]

Pages: 1

Words: 324

Essay

SOAP Note for Urinary Tract Infection, Essay Example

Chief Complaint Patient presents with mild fever, low back pain, and “burning” sensation while urinating for one week. Subjective The patient reports the burning sensation [...]

Pages: 1

Words: 153

Essay

Anxiety, Case Study Example

This is a case of a 47-year-old female social worker suffering from repeated episodes of clinical anxiety. In the background information given (which I won’t [...]

Pages: 1

Words: 211

Case Study

Major Depression, Case Study Example

Because there are many causes of depression, it is important to thoroughly evaluate a patient to determine if the mood disorder is precipitated by an [...]

Pages: 1

Words: 172

Case Study