Table 2: Absolute (f) and relative frequencies (%)a of professional comments and replies referring to all psychological publications documented in PsycINFOa and PSYNDEX up to 2015b.

Comments and replies
within different classification codes
CC: subdiscipline
21* History, systems, introductions 2,467 3.72 61 0.67
22* Psychometrics, statistics, methodology 6,803 2.93 1,312 3.52
23* Human experimental psychology 8,130 2.82 1,519 4.01
24* Animal exp. & comparative psychology 1,910 1.88 7 0.41
25* Physiological psychology, neuroscience 9,561 2.18 186 041
26* Psychology and the humanities 1,377 3.79 82 1.23
27* Communication systems 1,646 2.27 267 2.10
28* Developmental psychology 5,113 1.93 600 2.24
29* Social processes and social issues 6,948 2.62 604 1.41
30* Social psychology 2,583 1.91 414 3.18
31* Personality psychology 5,012 3.35 1,202 5.79
32* Clinical psychology: disorders 31,191 3.46 2,037 2.40
33* Clinical psych.: treatment & prevention 30,492 3.62 1,158 1.15
34* Psychological & health personnel issues 6,804 4.53 191 1.25
35* Educational psychology 4,001 1.02 1,033 3.34
36* Industrial & organizational psychology 2,996 1.52 667 2.56
37* Sport psychology & leisure 682 2.27 318 6.52
38* Military psychology 563 2.60 2 0.35
39* Consumer psychology 635 1.55 25 5.62
40* Engineering & environmental psychology 663 1.40 124 1.49
41* Intelligent systems 516 1.42 1 0.10
42* Engineering & environmental psychology 1,491 3.17 74 1.17

Notes:a With reference to all publications documented in the databases denoted by the publications years.
b Documentations of publications with the PsycINFO and PSYNDEX classification codes (CC) = 2* or 3* or 4* in the Thesaurus of Psychological Index Terms ([8], retrieval, e.g., from http://www.apa.org/pubs/databases/psycinfo/index.aspx).