Samenvatting
Summary SPSS Guide- everything you need to know
- Vak
- Instelling
A step by step SPSS guide, fool proof. This got me a 90+ on my icma on SPSS methods.
[Meer zien]Voorbeeld 4 van de 41 pagina's
Voorbeeld 4 van de 41 pagina's
In winkelwagen
In winkelwagen
Verkoper
Volgen
ofelyaka
Voorbeeld van de inhoud
Methods And Skills/ SPSSIV: gets manipulated
DV: changes as a result
Experiments
Look for significant differences between conditions to see if manipulation influenced
participants behaviour
Decide which statistical test to use to analyse data
1. How’s the IV operationalised
Between- Participants Design: Different participants take part in diff conditions
Within- Participants Design: All participants take part in both conditions
2. How many conditions does the IV have
2 conditions – use a t-test
More than 2 condition – use ANOVA
Between- Participants Design: Independent
Within- Participants Design: Repeated- measures
Example: Independent ANOVA
ANOVA
- statistical test
- Compares mean scores from diff conditions/groups
One-way: number of IVS
, One-way repeated- measures ANOVA – Week 3
1. Open file or enter data
2. Make sure each row contains all the data from one participant
Each columns represents each condition
To tell SPSS what your IVS are
3. Click Analyse> General Linear Model> Repeated Measures
4. ‘Define Within-Subject Factor Name’ and ‘Number of Levels’
5. Click ‘Add > ‘Define’
6. Highlight factor names and move them across using the arrow
7. Click ‘Plots’> Move ‘Factor’ across using arrow to ‘Horizontal Axis’
8. Click ‘Add’> ‘Continue’
To produce means for different conditions
9. Click on ‘EM Means’
10. Move factor across
11. Select ‘Compare Main Effects’ box
Choose Post-hoc Tests
12. Click on ‘Confidence Interval Adjustment’ and select ‘Bonferroni’ click ‘Continue’
To tell SPSS what information we want to produce as part of the ANOVA
13. Click ‘Options’
14. Select ‘Descriptive Statistics’ + ‘Estimates of effect size’ click ‘Continue’
If using independent ANOVAs select ‘Homogeneity tests’
READY TO RUN – Click ‘OK’
What does it all mean?
1st box - Within-Subjects Factors
- Tells you the levels of IV and the numbers SPSS assigned to them.
2nd box – Descriptive Statistics
- Looking at ‘Mean’ column, tells us on average- the highest, and lowest scores
- To see if differences are significant need to look at inferential statistics
3rd box - Multivariate Tests
- NOT NEEDED TO INTERPRET ANOVA- SO IGNORE
,4th box – Mauchly’s Test of Sphericity
- Tests if assumption of sphericity has been met
- Tests the assumption that the r.s between different pairs of conditions is similar
- Only look at this tables if variable has more than 2 levels (more than one pair)
- You DO NOT want Mauchly’s Test of Sphericity to be significant
- To report need ‘Chi-Square’ + ‘df’ and ‘p-values/ sig.’
5th box – Tests of Within- Subjects effects
- Gives you results of ANOVA
- Tells you if effect is statistically significant
Key columns - are ‘df’ + ‘F’ + ‘sig’ + ‘Partial Eta Squared’
1. df – degrees of freedom
- represents size of the sample
- w/repeated measures need to report two of the df values
- example – one for IV one for Error
2. F – F-Ratio
- Systematic variance divided by unexpected, unsystematic variance
- The larger the F-ratio the more likely IV had significant effect on DV
- If F < 1, result will never be significant – means there’s more unexplained variance in
data than can be accounted for by IV
3. Sig. – Significance Level
- Probability your results happened by chance if null hypothesis was true
- P-value should be smaller than 0.05 – reject null hypotheses
- Reject null hypothesis- results didn’t happen by chance or because of sampling error
but are because of the IV
- If P-value larger than 0.05, must retain null hypothesis- no different between
conditions
, 4. Partial Eta Squared
- Gives you an idea of how different your samples are
- Tells you effect size
- To determine how much of an effect IV had on DV can use following cut-offs to
interpret results
0.14 or more = Large effects
0.06 or more = Medium effects
0.01 or more = Small effects
Which numbers to use?
Depends on If assumption of Sphericity has been met
- If Mauchly’s test was non-significant (assumption was met) or if you had less than 3
levels in your IV, then read ‘Sphericity Assumed’ row
- If Mauchly’s test was significant (assumption wasn’t met) then read ‘Greenhouse-
Geisser’ row
Reporting Results
To explain need to refer to Descriptive Statistics
6th box – Test of Within-Subjects Contrasts
7th box – Test of Between- Subjects Effects
DON’T NEED THEM TO INTERPRET RESULTS
8th box- Estimates- Estimated Marginal Means
- Means for different levels of IV
- for one-way ANOVA – mean values same as ‘descriptive statistics’ box
- gives you standard error rather than standard deviations
Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:
Bewezen kwaliteit door reviews
Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!
In een paar klikken geregeld
Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.
Direct to-the-point
Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper ofelyaka. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor $9.96. Je zit daarna nergens aan vast.
Is Stuvia te vertrouwen?
4,6 sterren op Google & Trustpilot (+1000 reviews)
Afgelopen 30 dagen zijn er 65040 samenvattingen verkocht
Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen
Laatst bekeken door jou
Samenvatting ·
MAN401 - Vorlesungszusammenfassung
Samenvatting ·
Data wrangling and data analysis
Tentamen (uitwerkingen) ·
ATI RN Adult MedSurg Online Practice B
Voordeelbundel ·
Introduction to Microeconomics
Voordeelbundel ·
Voordeelbundel Methodologie + Economie
Samenvatting ·
samenvatting histologie (anatomie)
Samenvatting ·
Innate and adaptive immunesystem
Tentamen (uitwerkingen) ·
EMT Chapter Three (well explained)
