Investigación Lingüística
Evaluaciones válidas y confiables
Todos los puntajes de las pruebas potenciadas por IA se basan en una investigación exhaustiva, proporcionando una base confiable para evaluar las competencias lingüísticas del examinando.
Contáctanos»Fundamentada en una investigación académica sólida
Nuestra evaluación mide las habilidades en inglés de los examinandos en situaciones de la vida real, especialmente en contextos profesionales y académicos donde la comunicación en inglés es esencial.
Para alcanzar esto, la prueba potenciada por IA evalúa la precisión, la variedad y la claridad del inglés hablado y escrito, cubriendo aspectos tanto lingüísticos como pragmáticos.
Nuestras pruebas adaptativas de escucha y lectura están basadas en pasajes auténticos de audio y texto.
La prueba está estructurada para evaluar las competencias lingüísticas del examinando a través de niveles de puntuación. Todas las interpretaciones de los puntajes, así como las pruebas mismas, están fundamentadas en una sólida base teórica.
External Validation Study - Higher Education
Background
The Speaknow assessment is a computer-based test of spoken English. One of the primary uses of the exam is for higher education admissions or placement into an English language programs. As such, it is necessary to evaluate the adequacy of the exam to provide information for making decisions about the English levels of candidates for higher education. The ability of an exam to measure what it purports to measure is known as validity. There are many different methods for establishing validity. This paper explains the construct validity of the Speaknow assessment for use in higher education English programs.
There are two main methods of making admissions and placement decisions. One method is through standardized testing, and a second is through in-house testing. Standardized testing has the advantage of providing scores according to a recognized scale, and providing comparability with other, similar programs. External, standardized exams also have the benefit to the program of being more cost effective for the program, because students are generally the ones who pay for these exams. In-house exams have the advantage of being customizable and specified to the needs of the programs. They have the additional benefit to the students of shifting the cost for testing onto the program, rather than requiring often costly external exams (Ling, et al., 2014).
Personal interviews are often a part of English placement and admissions tests, such as the IELTS, and are also a frequent component of in-house tests. As such, interviews are a logical means of testing the validity of a standardized exam for making placement decisions.
The question that this study explored was how well do the scores of the Speaknow Assessment correspond to the scores of face-to-face interviewers for placement in English programs.
Method
51 prospective students at a teachers’ college in Israel volunteered to participate in the study. All of the students were interviewed by two different faculty members, who scored the students’ speech using CEFR aligned rubrics. Most, but not all of the faculty members have experience using the CEFR. Although each student was interviewed by two different faculty members, the interviewers were not necessarily consistent for each student.
After the interviews, the students took the Speaknow Assessment of speaking and listening. The college compiled the exam and interview scores and provided them to Speaknow with identifying information removed.
Results
The agreement of the Speaknow scores with the college interviewers is reported below. Both Light’s Kappa, and ICC scores are reported. The agreement of the Speaknow CEFR scores with those of the two raters shows that overall, the agreement between the Speaknow test scores and the college rater score is closer (0.923 and 0.931) than are the scores of the two college raters to each other (0.882).
Cohen’s Weighted Kappa scores are also reported. These scores take into account the size of the difference between the scores. Using this test, the relationship of the scores of the Speaknow Assessment with each of the raters (0.826, 0.825) is stronger than the scores between the raters (0.713).
Conclusions can not be drawn about the skill of any of the individual raters, because, as stated above, the interviewers were randomized. Overall, of the 51 exams scored, the Speaknow score agreed with both of the raters 27 times (53%), and with one of the raters in 22 cases (43%). In total, there was exact agreement between the Speaknow CEFR score and one of the interviewers in 96% of the cases.
Speaknow CEFR Score and 1st College Rater
Interrater Reliability
| n | rater | statistic | z | p | |
|---|---|---|---|---|---|
| Light's Kappa | 51 | 2 | 0.681 | 9.67 | 0.00 |
Interrater Reliability
| Method | Cohen's Kappa for 2 Raters (Weights: equal) |
|---|---|
| Subjects | 51 |
| Raters | 2 |
| Agreement % | 74.5 |
| Kappa | 0.826 |
| z | 9.13 |
| p-value | <.001 |
Intraclass correlation coefficient
| Subjects | Raters | Subject variance | Rater variance | Residual variance | Consistency | Agreement | |
|---|---|---|---|---|---|---|---|
| Value | 51 | 2 | 1.87 | 0.0251 | 0.132 | 0.934 | 0.923 |
Speaknow CEFR Score and 2nd College Rater
Interrater Reliability
| n | rater | statistic | z | p | |
|---|---|---|---|---|---|
| Light's Kappa | 51 | 2 | 0.657 | 9.41 | 0.00 |
Interrater Reliability
| Method | Cohen's Kappa for 2 Raters (Weights: equal) |
|---|---|
| Subjects | 51 |
| Raters | 2 |
| Agreement % | 72.5 |
| Kappa | 0.825 |
| z | 9.16 |
| p-value | <.001 |
Intraclass correlation coefficient
| Subjects | Raters | Subject variance | Rater variance | Residual variance | Consistency | Agreement | |
|---|---|---|---|---|---|---|---|
| Value | 51 | 2 | 1.86 | 0.00431 | 0.133 | 0.933 | 0.931 |
1st and 2nd College Raters
Interrater Reliability
| n | rater | statistic | z | p | |
|---|---|---|---|---|---|
| Light's Kappa | 51 | 2 | 0.444 | 6.57 | 4.89e-11 |
Interrater Reliability
| Method | Cohen's Kappa for 2 Raters (Weights: equal) |
|---|---|
| Subjects | 51 |
| Raters | 2 |
| Agreement % | 54.9 |
| Kappa | 0.713 |
| z | 7.93 |
| p-value | <.001 |
Intraclass correlation coefficient
| Subjects | Raters | Subject variance | Rater variance | Residual variance | Consistency | Agreement | |
|---|---|---|---|---|---|---|---|
| Value | 51 | 2 | 1.90 | 0.00196 | 0.253 | 0.883 | 0.882 |
Conclusions
The Speaknow Assessment was more consistent with any one interviewer’s assessment of the students’ English proficiency than were individual raters with each other. The high agreement between the Speaknow Assessment and the human interviewer scores (0.96) indicates that the Speaknow Assessment is a valid means of assessing students’ English proficiency level for use in a college program.
