IB Psychology Topic 2.4.4 Sampling Techniques Revision Notes (SL/HL)

IB Psychology Topic 2.4.4 Sampling Techniques Revision Notes (SL/HL) | RevisionDojo

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Sampling Techniques: How Researchers Choose Participants

Imagine you're conducting a study on stress levels among high school students.
You can't possibly survey every student in the world, so you need a sample, a smaller group that represents the larger population.
The way you select this sample can significantly impact the results of your study.

Self-Selected Sampling

In self-selected sampling, participants volunteer to be part of the study.
This method is often used in online surveys or studies advertised through posters or social media.

Example

A researcher posts a survey link on a school's website, inviting students to participate in a study on exam stress.
The students who choose to participate form a self-selected sample.

Strengths and Limitations

Note

Example

Strengths

Easy to recruit participants.
Participants are often motivated and engaged.

Note

Example

Limitations

Volunteer bias: Participants may differ from the general population (e.g., more motivated or extroverted).
Not always representative, limiting generalizability.

Opportunity Sampling

Opportunity sampling involves selecting participants who are readily available and willing to participate.

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Sampling Techniques: How Researchers Choose Participants

Imagine you're conducting a study on stress levels among high school students.
You can't possibly survey every student in the world, so you need a sample, a smaller group that represents the larger population.
The way you select this sample can significantly impact the results of your study.

Self-Selected Sampling

In self-selected sampling, participants volunteer to be part of the study.
This method is often used in online surveys or studies advertised through posters or social media.

Example

A researcher posts a survey link on a school's website, inviting students to participate in a study on exam stress.
The students who choose to participate form a self-selected sample.

Strengths and Limitations

Note

Example

Strengths

Easy to recruit participants.
Participants are often motivated and engaged.

Note

Example

Limitations

Volunteer bias: Participants may differ from the general population (e.g., more motivated or extroverted).
Not always representative, limiting generalizability.

Opportunity Sampling

Opportunity sampling involves selecting participants who are readily available and willing to participate.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

IB Psychology 2.4.4 Sampling Techniques Notes

1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

Sampling Techniques: How Researchers Choose Participants

Self-Selected Sampling

Strengths and Limitations

Opportunity Sampling

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Sampling Techniques: How Researchers Choose Participants

Self-Selected Sampling

Strengths and Limitations

Opportunity Sampling

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account