The standardized indirect effect represents the relationship between an independent variable and a dependent variable through a mediating variable. It is a crucial measure as it helps us understand how much of the total effect can be attributed to this mediation process. Nevertheless, Amos does not provide a statistical test for its significance.
This limitation in Amos arises due to various reasons. Firstly, testing for significance requires estimating standard errors and calculating p-values, which are not available for the standardized indirect effect in Amos. Secondly, it is important to consider that significance testing may not always be appropriate or meaningful in all research contexts.
Despite this limitation, researchers can still interpret and discuss the magnitude and directionality of the standardized indirect effect observed in their SEM models analyzed using Amos. By focusing on effect sizes rather than statistical significance alone, researchers can gain valuable insights into their research questions and contribute to scientific knowledge.