Evidence base
Lectical Assessments are designed to leverage the natural learning cycle. When learners take Lectical Assessments, they:
- demonstrate the level of their ability to work with real-world issues and problems that pose adaptive challenges;
- receive feedback directly on skills targeted by their assessment; and
- are provided with skill-specific reflective activities that are tailored to their personal learning needs.
During the last several years, we have worked with numerous clients to study the impact of Lectical Assessments on learning, and there are a number of findings we think you should know about.
The benefits of Lectical Assessments
Formative use increases growth
Using Lectical Assessments as intended—as learning tools—increases learning. On average, when Lectical Assessments have been used as learning tools, they have doubled the amount of growth that usually takes place in an educational program.
Using more increases growth
When Lectical Assessments have been used as learning tools in educational programs, simply increasing the number of Lectical Assessments taken by participants increased learning.
Their feedback supports growth
Educational programs that have incorporated the reflective activities suggested in Lectical Assessment reports—have produced more (and more robust) growth than those that have not.
Informal use supports growth
Simply following the learning suggestions in individual reports and engaging in reflection with peers about one's experience, has been shown to produce as much or more growth than the average formal education program.
They predict change in behavior
The direct reports and peers of leaders who increase their scores on Lectical Assessments have reported improvement in those leaders' performance (relative to leaders whose scores have not increased).
They aid in program development
When Lectical Assessments are used in evaluations of educational programs, they equip organizations with knowledge that can help them increase program impact.
They are remarkably fair
Lectica's breakthrough developmental scoring system, CLAS, has been shown to be free of gender, racial, and ethnic bias. To learn more, see Are Lectical Assessments fair?
They support optimal learning
Our assessment reports help people learn to build knowledge and skills more efficiently and enjoyably while participating in everyday activities.
They have a wide range of applications
Lectical Assessments not only support optimal learning. They can also be used in high-stakes contexts like recruitment & admissions.
Validity
When thinking about the validity of our assessments, we focus primarily upon construct validity**. Construct validity is usually thought of as the degree to which assessments measure what they are designed to measure, but since our assessments do much more than provide a score, we think of construct validity more broadly—as the degree to which our assessments accomplish what they are designed to accomplish. When we design and deliver assessments, we consider (1) the extent to which their scores capture the Lectical™ dimension (the skill level of the performance); (2) how well they target the domain or topic of interest; (3) their relevance, particularly with respect to the relevance of their feedback; and (4) their utility, particularly with respect to the value of their feedback.
Figure 1: Validity considerations for Lectical Assessments and DiscoTests
Bias
We do several things to address potential bias.
- We collect demographic information, including ethnicity, from all test-takers who are willing to provide it, and periodically use this information to look for any trends that might indicate bias.
- We score blind to ethnicity and all other demographic variables.
- We build the developmental dictionary (the Lectical Dictionary) behind our electronic scoring system by mining assessment responses for evidence of new meanings or new ways of expressing the same meaning. This means that different ways of expressing similar ideas are continuously being captured and accounted for.
Reliability
We track two forms of reliability: (1) internal consistency, which we examine with Rasch modeling software, and (2) inter-rater reliability.
Figure 2: Maintaining the reliability of our scores
Test-retest results
Test-retest studies of assessments scored with the Lectical Assessment system show no growth, on average, from test time 1 to test time 2 (when test-takers do not receive one of our formative reports).
Research
We have been conducting research on (and with) our assessments for several years. Some of this research has been published in peer-reviewed journals. Other research is documented in reports. The following section shows how some of our publications and reports relate to various aspects of reliability and validity. (Click on titles to view pdf documents.)
| Convergent validity | References |
|---|---|
| Psychometric modeling and qualitative analyses reveal that the LAS and several longitudinally validated domain-specific cognitive developmental assessment systems assess the same dimension of performance. | Dawson, T. L. (2000). Moral reasoning and evaluative reasoning about the good life. Journal of Applied Measurement, 1, 372-397. |
| Dawson, T. L. (2002). A comparison of three developmental stage scoring systems. Journal of Applied Measurement, 3, 146-189. | |
| Dawson, T. L. (2003). A stage is a stage is a stage: A direct comparison of two scoring systems. Journal of Genetic Psychology, 164, 335-364. | |
| Dawson, T. L., & Gabrielian, S. (2003). Developing conceptions of authority and contract across the life-span: Two perspectives. Developmental Review, 23, 162-218. | |
| Dawson, T. L., Xie, Y., & Wilson, M. (2003). Domain-general and domain-specific developmental assessments: Do they measure the same thing? Cognitive Development, 18, 61-78. | |
| Dawson, T. L. (2004). Assessing intellectual development: Three approaches, one sequence. Journal of Adult Development, 11, 71-85. |
| Predictive validity 1 | Evidence | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LectaTests are designed to target real-world skills—skills that make us better at what we do at work and in our personal lives. If we are doing a good job, working with our assessments should support behavioral change. | In a preliminary analysis of Clear Impact's ambitious 40-hour, 9 month, leadership training initiative involving four levels of management in a large North American city, we examined the effects of embedding up to 8 LectaTests (including pre-and post LDMAs) on manager's growth and collaborative behavior. Most of the results reported here are restricted to the LDMA data of supervisors who (1) completed pre and post LDMAs and (2) had two or more supervisees who had completed pre and post LDMAs.  |
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| Predictive validity 2 | |
|---|---|
| Upper-level managers, on average, have higher level decision-making skills than lower level managers. |  |
| Unidimensionality | References |
|---|---|
| Rasch modeling shows that the LAS captures a robust dimension of performance. | Dawson-Tunik, T. L. (2004). A good education is: The development of evaluative thought across the life-span. Genetic, Social, and General Psychology Monographs, 130, 4-112. |
| Dawson-Tunik, T. L., Commons, M., Wilson, M., & Fischer, K. (2005). The shape of development. The European Journal of Developmental Psychology, 2, 163-196. |
| Transformational learning | References |
|---|---|
| Rasch modeling shows that development along the latent dimension measured by the LAS is wave-like, a pattern that is consistent with the cognitive developmental postulate that development is characterized by a series of nested, hierarchical reorganizations of knowledge structures (rather than the simple accumulation of knowledge). | Xie, Y., & Dawson, T. L. (2006). Multidimensional models in a developmental context. In M. Garner, G. Engelhard, M. Wilson & W. Fisher (Eds.), Advances in Rasch Measurement: JAM Press. |
| Dawson-Tunik, T. L. (2004). A good education is: The development of evaluative thought across the life-span. Genetic, Social, and General Psychology Monographs, 130, 4-112. | |
| Dawson-Tunik, T. L., Commons, M., Wilson, M., & Fischer, K. (2005). The shape of development. The European Journal of Developmental Psychology, 2, 163-196. | |
| Dawson-Tunik, T. L. (2005, June). Cognitive change is stage-like: The cumulative evidence from a decade of Rasch modeling. Paper presented at the Annual Meeting of the Jean Piaget Society, Vancouver. | |
| Dawson, T. L. (2006). Stage-like patterns in the development of conceptions of energy. In X. Liu & W. Boone (Eds.), Applications of Rasch measurement in science education (pp. 111-136). Maple Grove, MN: JAM Press. |
| Internal consistency | References |
|---|---|
| The internal consistency of the LAS has historically been above .90. (As of 2009, we are maintaining alphas of .95 and above. In general, reliability studies show that we can have confidence in lectical scores to within 1/4 to 1/5 of a level, which means we can detect 4-7 distinct phases of performance within a typical classroom.) | Dawson, T. L. (2000). Moral reasoning and evaluative reasoning about the good life. Journal of Applied Measurement, 1, 372-397. |
| Dawson, T. L. (2002). A comparison of three developmental stage scoring systems. Journal of Applied Measurement, 3, 146-189. | |
| Dawson, T. L., Xie, Y., & Wilson, M. (2003). Domain-general and domain-specific developmental assessments: Do they measure the same thing? Cognitive Development, 18, 61-78. | |
| Dawson-Tunik, T. L. (2004). A good education is: The development of evaluative thought across the life-span. Genetic, Social, and General Psychology Monographs, 130, 4-112. | |
| Dawson-Tunik, T. L., Commons, M., Wilson, M., & Fischer, K. (2005). The shape of development. The European Journal of Developmental Psychology, 2, 163-196. |
| Inter-rater reliability | References |
|---|---|
| Inter-rater reliability for the LAS consistently has been above 85% agreement within 1/3 of a lectical level. (As of 2014, we maintain an inter-rater agreement rate of 85% within 1/5 of a level.) | Dawson-Tunik, T. L. (2004). A good education is: The development of evaluative thought across the life-span. Genetic, Social, and General Psychology Monographs, 130, 4-112. |
| Dawson-Tunik, T. L., Commons, M., Wilson, M., & Fischer, K. (2005). The shape of development. The European Journal of Developmental Psychology, 2, 163-196. | |
| Dawson, T. L. (2006). Stage-like patterns in the development of conceptions of energy. In X. Liu & W. Boone (Eds.), Applications of Rasch measurement in science education (pp. 111-136). Maple Grove, MN: JAM Press. |
| Statistical reliability | Alphas and variance explained by factor 1 (hierarchical complexity) | ||||||||||||||||||||||||||||||||||||
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| In Rasch analyses of the assessments developed by DTS, the lectical dimension (hierarchical complexity) consistently explains 79–99% of the variance in performances. |
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| Evaluation studies | References |
|---|---|
| Lectical assessments have been used in a number of evaluation studies. They have been shown to capture learning over relatively short interventions and in small cohorts. (See table below for results of several paired samples t-tests.) | Dawson-Tunik, T. L. & Stein, Z. (2004, July). Critical Thinking Seminar pre and post assessment results.Hatfield, MA: Developmental Testing Service, Inc. |
| Dawson, T. L., & Stein, Z. (2006). National decision-making curriculum. Results of the pre- and post-instruction developmental assessments. Northampton, MA: Developmental Testing Service. | |
| Dawson, T. L., & Stein, Z. (2006). Mind Brain & Education study: Final report. Northampton, MA: Developmental Testing Service, Inc. |
Impact of VCoL-rich curricula
This table shows growth during one VCoL-rich leadership training program. Total class time was 40 hours. (Upper = upper level managers, Middle = mid-level managers, and Supers = supervisors)
| The table on the right shows average growth for several projects that included pre- and post-assessment. Some of these programs featured VCoL-rich curricula. Others did not. The average growth for the 7 VCoL-rich programs was .083, whereas the average growth for the 3 more conventional content-based programs, was .21. |
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Detecting change over short periods in small samples
In the table below, paired-samples t-tests show levels of detectable growth in several program evaluations that were conducted with Lectical Assessments. They demonstrate that our measures can detect growth as small as .05 of a level in an average-sized classroom (NA1 2013, LDMA). Moreover, they show that measurable growth can occur with minimal instruction in a well-designed program. For example, the individuals in CI 2012 met only 4 times over the course of 3 months. Finally, results reveal less growth in programs that provide few opportunities for VCoL-style learning. The course taken in the NA 2012 project did not include any reflective activity. Subsequent NA studies deliberately incorporated increasing amounts of reflective activity.
| Study | N | Interval | DF | Mean time 1 | Mean time 2 | t2 - t1 | t | p |
|---|---|---|---|---|---|---|---|---|
| IT 2005, LDMA | 32 | 6 mos | 31 | 10.98 | 11.17 | 0.27 | 7.05 | .001 |
| CI 2012, LDMA | 31 | 3 mos | 30 | 11.24 | 11.30 | 0.06 | 2.01 | .053 |
| ST 2012, LDMA | 27 | 3 mos | 26 | 11.18 | 11.27 | 0.09 | 2.64 | .014 |
| AU 2010, LDMA | 44 | 12 mos | 43 | 10.92 | 11.08 | 0.16 | 2.19 | .034 |
| CI 2013, LDMA | 185 | 9 mos | 184 | 11.31 | 11.49 | 0.17 | 14.39 | .001 |
| AU 2011, LDMA | 57 | 12 mos | 56 | 11.24 | 11.28 | 0.04 | 1.50 | .140 |
| AU 2011, LDMA | 38 | 12 mos | 37 | 11.25 | 11.32 | 0.07 | 2.28 | .030 |
| ZV 2012, LDMA | 18 | 4 mos | 17 | 11.26 | 11.44 | 0.18 | 5.91 | .001 |
| NA 2012, LDMA | 24 | 1-3 mos | 23 | 11.25 | 11.28 | 0.03 | 1.41 | .170 |
| NA1 2013, LDMA | 16 | 3 mos | 15 | 11.24 | 11.29 | 0.05 | 3.30 | .001 |
| NA2 2013, LDMA | 19 | 3 mos | 18 | 11.23 | 11.30 | 0.07 | 3.63 | .001 |
| MH 2010, LRJA | 43 | 13 mos | 42 | 11.32 | 11.19 | 0.13 | 2.22 | .031 |
*All Lectical assessments meet or exceed the validity and reliability standards for educational and psychological testing set jointly by the APA, AERA, and NCME.
**See: Messick, S. (1980). Test validity and the ethics of assessment. American Psychologist, 35(11), 1012-1027.