How we scored ?

We computed several scores akin to those found in previous lexical proficiency tests such as LexTALE and LexITA. The server calculates original LexTALE scores (averaged accuracy) and both raw & normalized versions of the Ghent scores (HiLex score). To convert original LexTALE scores in percentage format, we can simply multiply the scores with 100.

  • Original LexTALE score (averaged accuracy) - range 0 to 1
    • \[Accuracy_{avg} = LexTALE\text{ }score = \cfrac{\cfrac{N_{corr-words}}{60} + \cfrac{N_{corr-nonwords}}{30}}{2} = \cfrac{N_{corr-words} + 2N_{corr-nonwords}}{120} \] It calculates average accuracy of words and pseudowords in the test, thus correcting for their unequal proportion. \[ LexTALE\text{ }score\% = Accuracy_{avg} \times 100 \] Original LexTALE scores should be in range 0 to 1 (or 0% to 100%) and any score above 50% should mean better-than-chance performance.

  • HiLex score (Ghent score in literature) - range -60 to +60
    • \[HiLex\text{ }score = N_{correct-words} - 2 \times N_{incorrect-nonwords} = hits - 2 falseAlarms \] To avoid confusion due to the nature of scorings and to be consistent with other LexTALE scores, we also adapted normalized Ghent scores (henceforth called normalized HiLex scores for the purpose of this test). HiLex scores should be in range -60 to +60 (or -1 to +1) and any score above 0 should mean better-than-chance performance.

  • Normalized HiLex score - range -1 to +1
    • \[Normalized\text{ }HiLex\text{ }score = \cfrac {N_{correct-words} - 2 \times N_{incorrect-nonwords}}{N_{words}} = \cfrac {hits - 2 falseAlarms}{60} \] It also takes in account the unequal proportion of pseudowords and penalizes for false responses. Any negative score indicates higher false-alarm rate than correct word identification.

Researchers have access to a comprehensive set of scores, including original LexTALE scores, normalized HiLex scores, as well as data on hits, false alarms, and reaction times for their participants.

Note: First FIVE items in the test are just for practice and its responses are not taken into account for the calculation of the scores.