Hence we will not go deeper into the problem of errors, but we can still undertake an expedition through the length of this field, in which we will reëncounter things familiar to us, and will come upon the tracks of some that are new. In so doing we will keep to the division which we made in the beginning of our study, of the three groups of tongue slips, with the related forms of pen slips, misreadings, mishearings, forgetfulness with its subdivisions according to the forgotten object (proper names, foreign words, projects, impressions), and the other faults of mistaking, mislaying and losing objects. Errors, in so far as they come into our consideration, are grouped in part with forgetfulness, in part with mistakes.
We have already spoken in such detail of tongue slips, and yet there are still several points to be added. Linked with tongue slips are smaller effective phenomena which are not entirely without interest. No one likes to make a slip of the tongue; often one fails to hear his own slip, though never that of another. Tongue slips are in a certain sense infectious; it is not at all easy to discuss tongue slips without falling into slips of the tongue oneself. The most trifling forms of tongue slips are just the ones which have no particular illumination to throw on the hidden psychic processes, but are nevertheless not difficult to penetrate in their motivation. If, for example, anyone pronounces a long vowel as a short, in consequence of an interference no matter how motivated, he will for that reason soon after lengthen a short vowel and commit a new slip in compensation for the earlier one. The same thing occurs when one has pronounced a double vowel unclearly and hastily; for example, an "eu" or an "oi" as "ei." The speaker tries to correct it by changing a subsequent "ei" or "eu" to "oi." In this conduct the determining factor seems to be a certain consideration for the hearer, who is not to think that it is immaterial to the speaker how he treats his mother tongue. The second, compensating distortion actually has the purpose of making the hearer conscious of the first, and of assuring him that it also did not escape the speaker. The most frequent and most trifling cases of slips consist in the contractions and foresoundings which show themselves in inconspicuous parts of speech. One's tongue slips in a longer speech to such an extent that the last word of the intended speech is said too soon. That gives the impression of a certain impatience to be finished with the sentence and gives proof in general of a certain resistance to communicating this sentence or speech as a whole. Thus we come to borderline cases in which the differences between the psychoanalytic and the common physiological conception of tongue slips are blended. We assume that in these cases there is a tendency which interferes with the intention of the speech. But it can only announce that it is present, and not what its own intention is. The interference which it occasions then follows some sound influences or associative relationship, and may be considered as a distraction of attention from the intended speech. But neither this disturbance of attention nor the associative tendency which has been activated, strikes the essence of the process. This hints, however, at the existence of an intention which interferes with the purposed speech, an intention whose nature cannot (as is possible in all the more pronounced cases of tongue slips) this time be guessed from its effects.
We have already spoken in such detail of tongue slips, and yet there are still several points to be added. Linked with tongue slips are smaller effective phenomena which are not entirely without interest. No one likes to make a slip of the tongue; often one fails to hear his own slip, though never that of another. Tongue slips are in a certain sense infectious; it is not at all easy to discuss tongue slips without falling into slips of the tongue oneself. The most trifling forms of tongue slips are just the ones which have no particular illumination to throw on the hidden psychic processes, but are nevertheless not difficult to penetrate in their motivation. If, for example, anyone pronounces a long vowel as a short, in consequence of an interference no matter how motivated, he will for that reason soon after lengthen a short vowel and commit a new slip in compensation for the earlier one. The same thing occurs when one has pronounced a double vowel unclearly and hastily; for example, an "eu" or an "oi" as "ei." The speaker tries to correct it by changing a subsequent "ei" or "eu" to "oi." In this conduct the determining factor seems to be a certain consideration for the hearer, who is not to think that it is immaterial to the speaker how he treats his mother tongue. The second, compensating distortion actually has the purpose of making the hearer conscious of the first, and of assuring him that it also did not escape the speaker. The most frequent and most trifling cases of slips consist in the contractions and foresoundings which show themselves in inconspicuous parts of speech. One's tongue slips in a longer speech to such an extent that the last word of the intended speech is said too soon. That gives the impression of a certain impatience to be finished with the sentence and gives proof in general of a certain resistance to communicating this sentence or speech as a whole. Thus we come to borderline cases in which the differences between the psychoanalytic and the common physiological conception of tongue slips are blended. We assume that in these cases there is a tendency which interferes with the intention of the speech. But it can only announce that it is present, and not what its own intention is. The interference which it occasions then follows some sound influences or associative relationship, and may be considered as a distraction of attention from the intended speech. But neither this disturbance of attention nor the associative tendency which has been activated, strikes the essence of the process. This hints, however, at the existence of an intention which interferes with the purposed speech, an intention whose nature cannot (as is possible in all the more pronounced cases of tongue slips) this time be guessed from its effects.