Specification - Model Diagram Symbols

6 important questions on Specification - Model Diagram Symbols

With what figure are observed variables presented?

Squares or rectangles

With what figure are latent variables presented?

Circles or Ellipses

How are hypothesized direct effects  presented?

With a signle arrowhead line ( -->)
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How are exogenous variables presented?

With a curved line with two errorheads (krom lijntje, met twee pijltjes).

How is the variance of an exogenous variable presented?

By an two-headed curved arrow that exit and reenter the same variable.

What is an endogenous variable?

The dependent variable.

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