This code system http://hl7.eu/fhir/ig/gk/CodeSystem/abacus defines the following codes:

Code	Display	Definition
fluency	Verbal Fluency Test	Verbal Fluency Test
picture-naming	Picture naming Test	Picture naming Test
repetition-sentences	Repetition of complex sentences Test	Repetition of complex sentences Test
prose-recall	Prose recall Test	Prose recall Test
words_tot_numberPanel	Word Count Panel	Word Count Panel
phonationSilence	Phonation vs Silence Panel
nlp	NLP Panel	NLP Panel
acoustic-measures	Acoustic measurements	Acoustic measurements
errors_number	Errors in the words produced	Errors in the words produced
words_tot_number_expected	Total number of words expected	Total number of words expected
words_tot_number	Total number of words produced	Total number of words produced
words_matching	Number of words correctly matching with the rule	Number of words correctly matching with the rule
duration	Duration of the measure	Duration of the measure
phonation_duration	Duration of the phonation	Duration of the phonation
phonation_duration_perc	Duration of the phonation (ratio)	Duration of the phonation(ratio)
silence_duration	Duration of the silence	Duration of the silence
silence_duration_perc	Duration of the silence (ratio)	Duration of the silence (ratio)
latency_time	Latency time	Latency time
silence_phonation_ratio	Silence phonation ratio	Silence phonation ratio
mean_intraword_time	Mean intraword time	Mean intraword time
shifts_number	Shifts Number	Shifts Number
cluster_numbers	Cluster Number	Cluster Number
mean_cluster_size	Mean cluster size	Mean cluster size
mean_f0	Mean fundamental frequency [Hz]	Mean fundamental frequency [Hz]
stdev_f0	Average standard deviation of F0 [Hz]	Average standard deviation of F0 [Hz]
hnr	Harmonic to Noise Ratio	Harmonic to Noise Ratio
jitter	Jitter	Jitter
shimmer	Shimmer	Shimmer