amos sem workflow

    1

    Automate AMOS SEM workflows from data cleaning and pre-flight validity checks to path diagram generation and APA reporting.

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    amos sem workflow

    Example session with this skill installed

    I have a structural model with 3 latent variables, each having 4 indicators. Generate the AMOS Plugin code to draw this CFA and calculate CR/AVE.

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    • Compiled the amos sem workflow

    I have generated the VB.NET code for an AMOS Graphics Plugin to automate your CFA drawing. This script will create the latent variables, attach indicators, and handle the covariances.

    AMOS Plugin Implementation

    Imports Amos
<System.ComponentModel.Composition.Export(GetType(Amos.IPlugin))>
Public Class AutoCFA
    Implements Amos.IPlugin

    Public Function MainSub() As Integer Implements Amos.IPlugin.MainSub
        pd.ViewPathDiagram()
        Dim Latents(3) As PDElement
        
        ' Draw 3 Latent Variables with 4 indicators each
        For i As Integer = 1 To 3
            Latents(i) = pd.DiagramDrawUnobserved(-200 + (i * 200), 0, 80, 50)
            Latents(i).NameOrCaption = "F" & i
            
            ' Add 4 indicator variables for each latent
            For j As Integer = 1 To 4
                pd.DiagramDrawIndicatorVariable(Latents(i))
            Next
        Next

        ' Draw Covariances between all latent variables
        pd.DiagramDrawCovariance(Latents(1), Latents(2))
        pd.DiagramDrawCovariance(Latents(1), Latents(3))
        pd.DiagramDrawCovariance(Latents(2), Latents(3))

        pd.EditFitToPage()
        pd.Refresh()
        Return 0
    End Function

    Public Function Name() As String Implements Amos.IPlugin.Name
        Return "Generate 3-Factor CFA"
    End Function

    Public Function Description() As String Implements Amos.IPlugin.Description
        Return "Automates path diagram for 3 factors with 4 indicators each."
    End Function
End Class

    Validity Calculation Formula
    To calculate CR and AVE after running this in AMOS, use the standardized loadings ($\lambda$):

    • CR (Composite Reliability): $(\sum \lambda)^2 / [(\sum \lambda)^2 + \sum(1-\lambda^2)]$
    • AVE (Average Variance Extracted): $\sum \lambda^2 / n$

    Next steps

    1. Compile this code into a DLL using Visual Studio or a VB compiler.
    2. Place the DLL in the C:\Program Files (x86)\IBM\SPSS\Amos\2X\Plugins folder.
    3. Restart AMOS and select "Generate 3-Factor CFA" from the Plugins menu.

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    About this skill

    Stop wasting time on SEM models that won't converge. This skill enforces a rigorous "pre-flight" check on your survey data before you ever touch AMOS, ensuring your variables meet the statistical thresholds required for structural equation modeling. It bridges the gap between raw data cleaning and final APA reporting by automating the tedious parts of the workflow.

    What it does

    • Data Pre-screening executes checks for Mahalanobis distance, Little's MCAR, and normality skewness/kurtosis to ensure data readiness.
    • Validity Auditing verifies Cronbach's alpha, CR, AVE, and HTMT ratios to prevent discriminant validity issues before modeling.
    • AMOS Automation generates VB.NET code for AmosGraphics plugins and AmosEngine scripts to automate path diagram drawing and estimation.
    • Model Evaluation provides standardized interpretation of fit indices like CFI, TLI, RMSEA, and SRMR against industry benchmarks.
    • Mediation Testing configures Bootstrap bias-corrected confidence intervals for robust indirect effect analysis.

    How it works

    1. Pre-check Phase: Use the skill to audit your EFA results and data distributions against SEM entry requirements.
    2. Model Construction: Request VB.NET plugin code or AmosEngine scripts to generate your CFA or structural path diagrams automatically.
    3. Execution & Refinement: Run the analysis and input the fit indices to receive theoretically-grounded modification advice.
    4. Reporting: Generate APA-formatted results blocks including path coefficients and validity tables.

    Frameworks & tools

    IBM SPSS AMOS (Versions 20-28+), VB.NET for Plugin development, AmosEngine API, and SPSS for initial data preparation.

    Why this beats prompting it yourself

    Generic AI often suggests adding paths based on Modification Indices (MI) without theoretical justification, leading to overfitted models that get rejected. This skill prioritizes structural integrity and provides the specific VB.NET syntax required for AMOS automation that standard LLMs frequently hallucinate.

    Use cases

    • Automating the creation of complex CFA models with dozens of indicator variables.
    • Performing rigorous mediation and moderation analysis using Bootstrap methods.
    • Validating measurement models for academic journal submissions.

    Known limitations

    Requires manual installation of compiled DLLs into the AMOS Plugins directory. Does not support PLS-SEM or Mplus specific syntax.

    How to use

    Skills on Agensi run inside your AI agent. Copy the prompt, paste it into your agent, and it connects to Agensi and installs this skill for you. If a payment is needed, your agent shows it to you first.

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