Conditions of the Growth of Association, or of the Retentiveness of the Mind.—A practical, as well as a theoretical, interest attaches to the precise statement of the conditions or circumstances that regulate the growth of our associations, in other words our mental culture generally. All agree in the efficacy of the two conditions mentioned in the text; the vividness of the feelings associated, and the frequency of the association, that is repetition or practice. It is well remarked, however, that the phrase “vividness of the sensations or ideas” does not convey a very precise meaning. The proper attribute of a sensation, or an idea, considered as an intellectual element, is greater or less distinctness; when an object seen or remembered is seen or remembered distinctly and fully, and without any unusual labour or effort, there is nothing more to be desired, so far as concerns our intelligence. If, however, the object is accompanied with feeling—with pleasure or pain—a new element is introduced, to which other epithets are applicable. A feeling is more or less strong or intense; and the addition of an intense feeling to an intellectual conception is a sum, combining both sets of attributes—distinctness and adequacy in the conception, and intensity in the feeling. An object whose perception or conception is thus accompanied with the animation of strong feeling, is called lively, or vivid; 117 in the absence of feeling, these epithets are unsuitable. Hence, the associating stimulus expressed by “vividness” is better expressed by the “strength of the feelings.” Any strong feeling impresses on the mind whatever is the object of it, or is in any way mixed up with it. We remember by preference the things that have given us either pleasure or pain; and the effect may be produced by mere excitement although neither pleasurable nor painful; the influence of a surprise being a case in point. Our interest in a thing is but another name for the pleasure that it gives us; and to inspire interest is to aid the memory. Hamilton’s Law of Preference refers to this source; and appears to exclude, or not to recognise, the efficacy of feelings not pleasurable, namely, such as are either painful or neutral. The comprehensive law should include all the feelings, although there are specific characters attaching to the influence of each of the three modes. Pleasure is the most effectual in stamping the memory, as it is the most powerful in detaining the attention and the thoughts. Pain has a conflicting operation; as affecting the will, it repels the object; but as mere excitement it retains it; we cannot forget what is disagreeable, merely because we wish to forget it. The stimulant of pain, as applied in education, is an indirect pleasure. It is not intended to make the subject of the lesson disagreeable, but to render painful all diversions from that towards other subjects; so that comparatively the most pleasing course to a pupil may be to abide by the task prescribed.

The influence of the Feelings upon Retentiveness is not throughout in proportion to their degree, whether they are pleasurable, painful, or neutral. We have to introduce a modifying circumstance into the case, namely, that great strength of feeling absorbs the forces of the system, and diminishes the power available for cementing an intellectual association. A strong feeling once aroused, while inflaming the attention upon whatever is bound up with it, necessarily engages us with itself. The plastic process of fixing a train or aggregate of ideas has but a share of the energies awakened under feeling.

It is possible also to stimulate attention, and thereby to 118 quicken memory, without the excitement of the feelings, as in pure voluntary attention. For although the will, in the last resort, is stimulated by an end (which must involve the feelings), yet we may be strongly moved without being under the excitement of the feelings that enter into the final end. Our volitions may be energetic, without the presence of strong emotions, notwithstanding that, apart from our possessing such emotions, we should not be strongly moved to action. Thus, a difference is made between the influence of the feelings and the influence of the will; both being powers to impress the memory.

The two considerations now advanced, namely, the want of strict concomitance between strength of feeling and the stimulus to memory, and the operation of the will in the abeyance of present feeling, make it desirable to find some other mode of stating the element or condition that qualifies the influence of Frequency or Repetition, in the growth of memory and association. Perhaps the best mode of singling out the operative circumstance is to describe it as “Concentration of Mind;” the devotion of the mental forces to the thing to be done or remembered—the withdrawal of power from other exercises, to expend it on the exercise in hand. Every circumstance that at once rouses the mental and nervous energies, and keeps them fixed upon any subject of study or the practice of any art, is a circumstance in aid of acquisition. No fact more comprehensive, more exactly in point, can be assigned than the one now stated. What remains is to apply it in the detail, or to point out the occasions and conditions that favour, and those that obstruct, the concentration of the mental energy. It is under this view that we can best appreciate the efficacy of pleasure (interest in the subject), of pain, of mere excitement, and of voluntary attention. We can also see, as an obvious corollary, the advantage of having the mind unoccupied, or disengaged for the work, and the disadvantage of being diverted, or distracted by other objects. Fear, care, anxiety, are hostile to culture by lowering the tone or energy of the mind; while what power is left concentrates itself upon the subject matter of the anxious feeling. On the other hand, general vigour of the 119 system, good health, easy circumstances, are all in favour of mental improvement, provided the force thus made available can be reserved and devoted to that end.

Thus the two leading conditions of the plastic process are Frequency of Repetition, and Mental Concentration. For practical purposes, these are all that we need to consider, at least as regards the same individual. We have no art or device for training either body or mind but what is comprised under one or other of these heads. There are methods of superseding the labour of new acquirement, by adapting existing acquirements to new cases; but no means can be assigned for the original construction of adhesive links, apart from these two circumstances.

Still, in a large and exhaustive view of the Retentive power of the mind, we should not omit to allow for the differences between one mind and another in respect of Natural Aptitude for acquiring. When two persons engaged in the same lesson, for equal periods of time, and with about equal concentration of mind, make very unequal progress, we must admit a difference in natural or constitutional plasticity on that particular subject. Sometimes we find extraordinary progress made in acquisition generally; the same person excelling in languages, in sciences, in practical arts, and in fine arts. More commonly, however, we find an aptitude for some subject in particular, combined with deficiency in other things. One person has great mechanical acquirements, another lingual, and so on.

The first case is sufficiently common to justify the assumption of degrees of acquisitive or plastic aptitude on the whole, or a variety in the cerebral endowment corresponding to the adhesion of trains of actions and ideas that have been more or less frequently brought together. If the differences among human beings are not so broad as to make this apparent, we may refer to the differences between the lower animals and man. The animals have the power of acquiring, but so limited is that power in comparison with human beings, that people have often doubted its existence.

120 The second case, the inequality of the same person’s progress in different subjects, may be looked at in another way. We may view it as incident to the better or worse quality, for all purposes, of the special organs concerned. Thus to take musical acquisition. This is commonly attributed to a good ear, meaning a delicate sense of musical notes, as shown in their nice discrimination. Discriminating is a different function from remembering; yet, we can only doubt that the fact of being able to discriminate acutely is accompanied by the power of remembering or retaining the impressions of the sense. The superiority of endowment that shows itself in the one function, embraces also the other. Hence we are entitled to say that the special retentiveness for any one subject, or department of training, varies with the local endowment involved: which is not to maintain an identical proposition, for the local endowment may be held as tested by delicacy of discrimination, a distinct fact from memory. Thus, a delicate sense of shades of colour would entail a good visual memory for spectacle; a delicate ear for articulation would indicate a memory for shades and varieties of pronunciation, thereby counting as a part of the verbal memory. So, delicate discrimination in the tactile muscles would be followed by rapid acquirements in manipulative or manual art.

The Ultimate Analysis of the Laws of Association.—It is easy to reduce all the laws ever assigned, as governing the reproduction of our ideas, to three, Contiguity, Similarity, and Contrast. It is open to question whether these can be resolved any farther. The author has endeavoured to reduce Similarity to Contiguity, but his reasons show that he had not deeply considered the workings of similarity. Hamilton’s criticisms on the attempt (Reid, p. 914) are just and irrefragable. By far the most important examples of the working of similarity are such as, by their very nature, preclude a former contiguity: as, for example, Franklin’s identification of Electricity and lightning.

There is, nevertheless, a considerable degree of subtlety in the relationship of the two principles. There may be good reasons 121 for treating them as distinct, but in their working they are inextricably combined. There can be no contiguity without similarity, and no similarity without contiguity. When, looking at a river, we pronounce its name, we are properly said to exemplify contiguity; the river and the name by frequent association are so united that each recalls the other. But mark the steps of the recall. What is strictly present to our view is the impression made by the river while we gaze on it. It is necessary that this impression should, by virtue of similarity or identity, re-instate the previous impression of the river, to which the previous impression of the name was contiguous. If one could suppose failure in the re-instatement of the former idea of the river, under the new presentation, there would be no opportunity given to the contiguous bond to come into operation. In that accumulation of the impressions of contiguous ideas, ending at last in a firm association, there must be a process of similarity to the extent of reviving the sum of the past at the instance of the present. This is a case of similarity that we give little heed to, because it is sure and unfailing; we concern ourselves more with what is liable to uncertainty, the acquired strength of the contiguous adhesion. Yet it strictly comes under the case of reproduction through similarity.