Statement validity analysis (SVA) is actually a range of procedures for generating and testing hypotheses about the likely veracity of a given statement. The theoretical basis for SVA is the 'Undeutsch hypothesis', which postulates that statements that are the product of experience will contain characteristics that are generally absent from statements that are the products of imagination. The starting point for SVA is the conducting of background research into the case in question. Köhnken, in particular, stresses the criticality of gathering information on the witness, events in question, previous statements and any apparent inconsistencies which are assessed by means of a thorough analysis of case file data. Usually, statements are read and coded for the presence of criteria-based content analyses (CBCA) criteria. Whilst demonstrating face validity, reliability of the components of CBCA and the Validity Checklist remain contested. Advice from practitioners suggests that SVA requires training before use.