# The four ASD assessments ## Background Within the 3di's autism provision, there are four different assessments: 1. ICD-10 ASD extended 2. ICD-10 ASD brief 3. DSM-5 ASD extended 4. DSM-5 ASD brief In total the 3di has a bank of nearly 900 questions, all of which are listed in the [Interview Explorer](/using-the-software/conducting-an-interview.md#the-interview-explorer). However, in typical usage you will answer only a much smaller set of questions drawn from this bank, known as a [route](/using-the-software/routes.md). Each ASD assessment has its own route, scoring algorithm, and scoring tables in the [Word reports](/using-the-software/reports.md). The four assessments were added to the software over 25 years of research and use. In contemporary training, we only teach the newer DSM-5 assessments. However, the older ICD-10 assessments are still present in the latest 3di software for use by those who trained in them. The ASD routes contain only those questions which contribute to the scoring tables in the report. They do not contain the qualitative questions about the child's family, medical and educational history. For a richer report, you can complete these in advance using [pre-entry](/using-the-software/pre-entry-forms.md), or during the interview via the [Interview Explorer](/using-the-software/conducting-an-interview.md#the-interview-explorer). ## The ASD assessments today ### 1. ICD-10 extended This was the first ASD algorithm implemented in the 3di, around 2004. Its scoring is based on 134 questions. The corresponding route is *ASD\_extended (ICD-10)*. This original 3di assessment was published in [The developmental, dimensional and diagnostic interview (3di): a novel computerized assessment for autism spectrum disorders](https://doi.org/10.1097/00004583-200405000-00008) and is the most widely translated and validated version in languages other than English. In current 3di versions, if you want to run this assessment, you will have to choose to include its scoring tables in the report via the [Preferences form](/using-the-software/reports.md#including-icd-10-scores). The output of this algorithm appears only in the extended report, under the heading *ICD-10 ASD*. It does not appear in the brief report. Previously, the ICD-10 extended was known simply as *ASD\_extended*. ### 2. ICD-10 brief This was the second ASD algorithm implemented in the 3di, around 2009. Its scoring is based on 61 questions. The corresponding route is *ASD\_brief (ICD-10)*. The derivation and validation of this assessment was published in [The construction and validation of a short form of the developmental, diagnostic and dimensional interview](https://doi.org/10.1007/s00787-009-0004-0). It also sees widespread use especially in non-English translations of the 3di. In current 3di versions, if you want to run this assessment, you will have to choose to include its scoring tables in the report via the [Preferences form](/using-the-software/reports.md#including-icd-10-scores). The output of this algorithm appears only in the brief report, under the heading *ICD-10 ASD*. It does not appear in the extended report. Previously, the ICD-10 brief was known simply as *ASD\_brief* or sometimes *3di-sv* for '3di short version'. ### 3. DSM-5 extended This was the third ASD algorithm implemented in the 3di, around 2013. Its scoring is based on 177 questions. The corresponding route is *ASD\_extended (DSM-5 Crit A+B)*. This output of this algorithm appears only in the extended report, and not in the brief report, under the heading *DSM-5: ASD extended assessment*. ### 4. DSM-5 brief This was the fourth ASD algorithm implemented in the 3di, in 2022. Its scoring is based on 66 questions. The corresponding route for this algorithm is named *ASD\_brief (DSM-5 Crit A+B)*. This output of this algorithm appears in both the brief and extended reports, under the heading *DSM-5: ASD brief assessment*. ## Scoring details Your [3di installation folder](/using-the-software/frontend-and-backends.md#the-3di-and-the-disc-filing-system) contains a Reference subfolder with details of how the four algorithms work. * For algorithms 1 and 2, *ASD\_three-domain\_scales\_defined* and *ASD\_diagnosis\_flowcharts\_3\_domain* describe the algorithm for computing scores, and the rules for determining if diagnostic criteria have been met. *ASD\_scales\_Ref* details which individual questions contribute to each subscale. * For algorithms 3 and 4, *DSM-5\_ASD\_scoring* describes the algorithm, while *ASD\_scales\_Ref* details which individual questions contribute to each subscale. ## 3di-adult You may have heard about this assessment. The 3di-adult is a standalone pen-and-paper tool developed as part of a research project, which drew on the 3di question bank. The 3di-adult has not been implemented in the 3di software, and presently there are no plans to do so. You can read about the 3di-adult [here](https://link.springer.com/article/10.1007/s10803-017-3321-z). The 3di software is currently not suitable for the assessment of adults. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ixdx.org/clinical-background/the-four-asd-assessments.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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