Echo-Adapt™ Adaptive Testing Technology

Personalized testing experience to maximize efficiency.

The optimal test delivery engine

Echo-Adapt allows you to minimize testing time while maximizing certainty about what a test-taker knows and can do by deciding which test questions will be most relevant for each test-taker after every response.

Adaptive testing estimates the ability of each examinee at different stages of a test and optimizes the selection of items that provide the most information about a given examinee’s ability. Logically, providing an item that is much too easy or much too difficult to an examinee does not provide any useful information on the examinee’s ability. Adaptive testing uses Item Response Theory (IRT), which describes the likelihood of a examinee with a given ability to answer a test item correctly, to match item difficulty with examinee ability.

Seamless integration

Either integrated seamlessly with Unity® online test delivery capabilities, or working directly with your test delivery platform, Echo-Adapt is cloud-deployed for high performance, high availability and fault tolerance. Echo-Adapt is designed to be compatible with the emerging IMS Global aQTI CAT standard.

Applying the Shadow Test approach

Our adaptive testing technology allows customers to transparently configure their assessment and deliver it with ease. Echo-Adapt uses the shadow testing approach to guarantee all test blueprint, shared stimulus, and psychometric constraints are met while optimizing the selection of items. This maximizes information at
specified ability levels throughout the testing experience.

Computer adaptive testing tailors an online test to a specific examinee by varying the difficulty of items, based on the examinee’s estimated ability. For an individual examinee, an adaptive test includes items from an item/passage pool that better match the examinee’s ability while still conforming to the overall test blueprint.

Echo-Adapt provides these advantages over fixed-length, fixed-content tests:

  • Shorter tests. Because test items are selected based on the examinee’s ability, an adaptive test can gain certainty about the examinee’s ability level more quickly, greatly reducing the number of test items.
  • Examinee engagement. Because test items are selected based on the examinee’s ability, an adaptive test can provide items that engage examinees–rather than items that are far too easy or far too difficult for a given examinee.
  • Item security. Because test items are selected based on the examinee’s ability, an adaptive test will include different items and a different order of items across examinees, reducing the risk of cheating.

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