*EDU 5900KAEDAH PENYELIDIKAN

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Kaedah Penyelidikan Quasi-Eksperimen dan ex-post facto

*OBJEKTIF

Menerangkan konsep, tujuan dan kepentingan kaedah penyelidikan Quasi-Eksperimen dan ex-post facto.Menilai kesesuaian penggunaan kaedah tersebut bagi permasalahan kajian yang dikemukakan.Merancang langkah-langkah pelaksanaan kajian mengikut kaedah tertentu.

*Rekabentuk Quasi-EksperimenThe word "quasi" means as if or almost, so a quasi-experiment means almost a true experiment.

*Kenapa Quasi-Eksperimen?Dinamakan Quasi-Eksperimental kerana penyelidikan yang dilakukan hampir menyerupai reka bentuk eksperimen, kecuali tiada pembahagian secara rawak dilakukan.

Pembahagian rawak sukar dijalankan dalam keadaan tertentu seperti pemboleh ubah atribut (jantina, ras, pendapatan penjaga dll) kerana akan menjejaskan pemboleh ubah seperti rasa terasing dalam kumpulan baru dan sebagainya. Oleh itu reka bentuk ini digunakan.Kaedah reka bentuk quasi-eksperimen bukan sebenar-benar eksperimen kerana tiada pembahagian rawak dilakukan.Gunakan kumpulan sedia wujud dalam (intact group).

*QUASI-EXPERIMENTAL DESIGNS

QUASI-EXPERIMENTAL DESIGNS; are usually constructions that already exist in the real world. Those designs that fall into the quasi-experimental category fall short in some way of the criteria for the true experimental group. A quasi-experimental design will have some sort of control and experimental group, but these groups probably weren't randomly selected. Random selection is usually where true-experimental and quasi-experimental designs differ. Some advantages of the quasi-experimental design include: Greater external validity (more like real world conditions) Much more feasible given time and logistical constraints

Disadvantages: Not as many variables controlled (less causal claims)

*Ciri-Ciri Rekabentuk Quasi-EksperimenDua atau lebih daripada kumpulan responden yang tidak diagih secara rawak.Memerlukan kawalan terhadap pemboleh ubah luaran yang tegas. Mengutamakan perbezaan antara kumpulan responden secara semula jadi.

*Perbezaan antara eksperimen dengan quasi-eksperimen.Aktiviti bacaan: Sila baca artikel yang bertajuk;EXPERIMENTAL AND QUASI-EXPERIMENTAL RESEARCH DESIGN True and Quasi-Experimental Designs.

*Kaedah Ex Post Facto Perbandingan Sebab (Causal Comparative)

*Ex post factoThe Latin term "Ex post facto" means, in a UK legal context: "by reason of a subsequent act".

13Causal-Comparative StudiesGo beyond relationships/associations to examine cause-and-effects.

Two types of these studies:Ex Post FactoCorrelational

Ex post factofrom what is done afterwardsEx post factoThe Latin term "Ex post facto" means, in a UK legal context: "by reason of a subsequent act". Ex-post-facto designs ("after the fact")

*Definisi:

Kaedah ini digunakan untuk mengenal pasti punca atau penyebab (IV) sesuatu kesan (DV) yang diperhati dimana IV adalah sesuatu yang telah berlaku dan tidak boleh dimanipulasikan(diluar kawalan penyelidik.

Casual Research explores the effect of one thing on another and more specifically, the effect of one variable on another.

Lihat contoh dalam Noraini Idris (2010), ms. 230

17Causal-Comparative StudiesImportant Issues:Primary purpose should be developing cause-and-effect relationships when experimentation is not possibleThe intervention (IV) must have already occurredMust identify and consider extraneous variablesDifferences between the groups not due to the independent variable should be controlledBe careful with causal conclusions

*Reka bentuk ini menekankan sebab yang dijangka. Contoh 1: Adakah program pendidikan pemulihan meningkatkan prestasi 3M murid-murid yang lemah?Contoh 2: Adakah program kaunseling individu meningkatkan motivasi murid bermasalah?Tafsiran sebab-akibat (cause-effect relationship)Penyelidik perlu memastikan:Terdapat hubungan antara A (IV) dan B (DV);A datang dahulu daripada B;Tidak ada kesan pemboleh ubah luaran terhadap A, B atau interaksi A dan B.

*Perhubungan statistik yang signifikan antara pemboleh ubah bebas dan bersandar wujud dengan sah.

Pemboleh ubah bebas wujud sebelum pemboleh ubah bersandar.

Pemboleh ubah lain tidak mempengaruhi pemboleh ubah bersandar. Tiga Jenis Bukti Yang Perlu Untuk Mengesahkan Hubungan Sebab-akibat

*Begin with subjects who differ on an independent variable (such as their principal instrument/voice) and study how they differ on dependent variables (such as levels of performance anxiety or music theory test scores).

Begin with subjects who differ on a dependent variable (such as attrition from music--comparing those students who drop out of music with those who persist) and study how they differ on various independent variables (such as how much they practice, how they feel about their relationship with their teacher, how they feel about themselves as musicians, etc.).Two Basic Approaches to Ex Post Facto Research

*This type of study is very common and useful when using human subjects in real-world situations and the investigator comes in "after the fact." For example, it might be observed that students from one town have higher grades than students from a different town attending the same high school. Would just "being from a certain town" explain the differences? In an ex post facto study, specific reasons for the differences would be explored, such as differences in income, ethnicity, parent support, etc.

Studies that investigate possible cause and effect relationships by observing an existing condition or state of affairs and searching back in time for plausible causal factors. The ex post facto design is a variation of the "after-only with control group" experimental design. The chief difference is that both the experimental and control groups are selected after the experimental variable is introduced rather than before. Explores possible causes and effects. The independent variable is not manipulated, it has already been applied. Focuses first on the effect, then attempts to determine what caused the observed effect.

Characteristics of Ex Post FactoResearcher takes the effect/dependent variable and examines it retrospectivelyEstablishes causes, relationships or associations and their meanings.Researcher has little to no control over independent variables.Flexible by nature.There is a control or comparison group. Intact groups are used. The treatment is not manipulated, it has already occurred. There may be both treatment and control groups, however these will be existing, not assigned by the researcher.There is no manipulation of conditions

*Ex Post Facto researchResearcher cannot manipulate some variables and therefor selects participants that have certain values for those variables by themselves (gender, personality, illness, ...)

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The experimenter does not manipulate the IV... that is subjects cannot be randomly assigned to the levels of the IV - rather they assign themselves because the IV is not manipulated, it also qualifies as a descriptive technique

When to use this?You can use this where more powerful experimental designs are not possible; when you are unable to select, control and manipulate the factors necessary to study cause and effect relationships directly, or when control variables except a single independent variable may be unrealistic and artificial.

Ex post facto advantages and disadvantagesAdvantagesShow a correlation where more rigorous experimentation is not possibleExploratory toolUseful to avoid articiality in the research.Shows cause and effect relationshipsDisadvantagesLack of control for independent variable and randomizing subjects.Never certain if causative factor has been included or identifiedRelationship between two factors does not est. cause and effect.May be regarded as too flexible.

*Melibatkan perbandingan antara kumpulan yang sedia wujud

Contoh: Menyelidik murid-murid yang menonton rancangan belajar bahasa Inggeris melalui siaran TV dan membandingkan prestasi mereka untuk mengkaji sama ada menonton program bahasa Inggeris di TV dapat membantu meningkatkan pencapaian mata pelajaran tersebut. Murid-murid dikumpulkan dalam beberapa kumpulan mengikut banyaknya mereka menonton siaran tersebut.

*Examples of Ex Post Facto Studies

What is the effect of day care on the social skills of children?What is the relationship between participation in extracurricular activities and self concept? "smoking causes cancer

*Ex Post Facto - exampleDepression in rape victims

*Research designX1 = rape victimX2 = control Yij = average depression score in group i, at time j---- indicates possible unequality of groups in both conditions

*Kajian perbandingan sebab perlu digunakan apabila kajian eksperimen tidak dapat dilakukan. Keadaan sebab mesti berlaku sebelumnya. Pemboleh ubah ekstranous perlu dikenal pasti dan dicatat. Perbezaan antara kumpulan perlu dikawal.Hubungan sebab-akibat perlu dinyatakan dengan berhati-hati!TipsBaca Noraini Idris (2010), ms. 235 (Jadual 12.1)

*MIXED METHODS DESIGN

What Is Mixed Methods Research? A mixed methods research design is a procedure for collecting, analyzing, and mixing both quantitative and qualitative research and methods in a single study to understand a research problem.

Combined Designs and UsesMixed MethodsResearchActionResearchCombining quantitative andqualitative data to understand and explain a research problem better.Using quantitative and qualitative data for individuals to study problems that they face in their setting

When to Use Mixed Methods DesignsWhen both quantitative and qualitative data, together, provide a better understanding of your research problem than either type by itself When one type of research (qualitative or quantitative) is not enough to address the research problem or answer the research questions.To incorporate a qualitative component into an otherwise quantitative studyTo build from one phase of a study to anotherExplore qualitatively then develop an instrumentFollow-up a quantitative study qualitatively to obtain more detailed information

Identifying a Mixed Methods Study in the LiteratureThe title includes words such as mixed methods or multimethod, etc.Data collection section indicates both qualitative and quantitative data were collected.Purpose statement and/or research questions indicate that the researcher intends to collect both quantitative and qualitative data during the study.Priority or weight: Qualitative, quantitative, or both equallySequence of collecting quantitative and qualitative data is indicatedAnalyze both data setsCombined in one analysis (integrated)Separate analysis

A Notation System for DesignsStudy #1 QUAL + QUAN+ indicates the simultaneous or concurrent collectionof quantitative and qualitative dataStudy #2 QUAN qualShows sequential collection ofquantitative and qualitative dataUppercase letters indicate a priority or increasedweight for quantitative and/or qualitative data.Lowercase letters indicate a lower priority or weightfor either quantitative and/or qualitative data.NOTATION USED

Types of Mixed Methods DesignsI. Triangulation Mixed Methods DesignII. Explanatory Mixed Methods DesignIII. Exploratory Mixed Methods DesignQUANData and ResultsQUANData and Results+QUALData and ResultsQUALData and ResultsqualData and ResultsquanData and Results InterpretationFollow-upBuilding

Mixed Methods Designs: Explanatory DesignResearcher places priority on quantitative (QUAN) data collection and analysis.Researcher collects quantitative data first in the sequence.Researcher uses the qualitative data to explain the results of the quantitative data.

Mixed Methods Designs: Exploratory DesignResearch emphasizes qualitative (QUAL) data rather than quantitative (quan) data.Researcher has a sequence of data collection that involves collecting qualitative data followed by quantitative data.Researcher plans on the quantitative data to build on or explain the initial qualitative findings.

Key Characteristics of Mixed Methods DesignsRationale for the designCollecting quantitative and qualitative dataPrioritySequenceData analysis matched to designDiagram of the procedures

Key Characteristics of Mixed Methods Designs: RationaleRationaleTest findings of first phaseExplain results of first phase in more detail Provide a more complete understanding than either quantitative or qualitative aloneCollecting both quantitative and qualitative dataNumeric dataText data

Key Characteristics of Mixed Methods Designs: Priority and SequencePriorityEqual weightQUAN carries more weight than qualQUAL carries more weight than quanSequenceCollect both quantitative and qualitative data at the same timeCollect quantitative data first, followed by qualitative dataCollect qualitative data first, followed by quantitative data

Key Characteristics of Mixed Methods Designs: Analysis and DiagramAnalysis matched to design (mixing)Data analysis strategies for triangulation designData analysis strategies for exploratory designData analysis strategies for explanatory designDiagram of proceduresUse notation systemIdentify priorityIdentify sequence

Examples of Visual DiagramsI. Triangulation Mixed Methods DesignII. Embedded Mixed Methods DesignQUAN(Data and Results)+QUAL(Data and Results)InterpretationQUANData and ResultsQUAN(Data and Results)Interpretation

III. Explanatory Mixed Methods DesignIV. Exploratory Mixed Methods DesignQUAN(Data and Results)QUAL(Data and Results)qual(Data and Results)quan(Data and Results) Follow-upBuildingExamples of Visual Diagrams (contd)

Steps for Conducting a Mixed Methods StudyDetermine if a mixedmethods study isfeasibleDevelop quantitativeand qualitative research questionsCollect quantitativeand qualitative data

Analyze data separately orconcurrently

Write the report as a one- or two-phasestudyIdentify the data collection strategy andtype of designIdentify a rationale for a mixed methodsstudyStep 1Step 2Step 4Step 3Step 5Step 6Step 7PrioritySequenceVisualization

Choosing Whether to Use a Quantitative or Qualitative ApproachMatch the approach to the problemFit the approach to your audienceRelate the approach to your experiences

*SEKIAN

TERIMA KASIH

*1317******