A Comparison of Waking
Instruction and Posthypnotic Suggestion for
Lucid Dream Induction
JOSEPH R. DANE and ROBERT L. VAN DE CASTLE
University of Virginia Medical School, Charlottesville
The following is a summary of the methodology, results and conclusions of a dissertation . . . available through University Microfilms.
The original purpose of this study was to evaluate two techniques for lucid dream induction in formerly nonlucid dreamers during one night in the sleep labor-atory. However, efforts to correct a suspected flaw in one of these techniques fortu-itously led to the development and comparison of four experimental conditions.
Subjects were 15 pairs of matched hypnotically susceptible females (ages 18 32) reporting recall of at least one dream a month and no prior experience with lucid dreaming. Only females were used. . . . All subjects were in the upper fiftieth per-centile of hypnotic susceptibility as indicated by a score of 5 or above on the Stan-ford Hypnotic Susceptibility Scale, Form C (SHSS:C).
The initial methodology called for comparing the effects of lucid dream induc-tion capacity via Waking Instructions (WI) with that of Waking Instructions plus Posthypnotic Suggestion (WI + PHS) (N = 15 per group). Posthypnotic Suggestion included generalized reinforcement of Waking Instruction and was individually administered by the experimenter the night of each subjects participation in the lab. PHS also provided a hypnotic encounter with a personalized "dream symbol" before going to sleep in the laboratory. During this encounter, subjects were instructed to ask for their symbols help in becoming lucid during their dreams that night.
Personal symbols were developed based on discussion of the subjects imagery which had occurred in response to item 6 of the Stanford Hypnotic Susceptibility Scale, Form C (viz., "go to sleep and have a dream about hypnosis"). The rationale given for development and use of this symbol was twofold. First, lucid dream induc-tion was described as a process of enhancing cooperation between "waking" con-sciousness and "dream" consciousness, such that dream consciousness would be willing to allow the "intrusion" of waking consciousness into its presence. Second, it was explained that the imagery being discussed reflected the subjects individual-ized view of her own dream consciousness, and that symbols based on this imagery could provide a useful "ally" in eliciting the desired cooperation. Other than differ-ences in the dream symbols themselves, hypnotic procedures and suggestions were the same for all participants.
The Original Waking Instructions (OWI) were likewise administered by the ex-perimenters on the night of each womans participation in the lab. OWI focused on maintaining an inquisitive attitude toward ones experience and on evaluating that experience throughout the night by constantly asking, "Am I dreaming now? Is this a dream?" In order to reinforce this focus, and to establish a habit of communication with the experimenter, OWI also directed subjects to give a prearranged ocular sig-nal whenever they found themselves asking this question, regardless of how they themselves might answer the question. The intent was that the sleepers could then be wakened by the experimenters and receive feedback about whether or not they had indeed been dreaming, thus gradually increasing their awareness of subtle altera-tions in subjective experience as they approached the dream state. Subjects were also told to continue signaling every minute to a minute and a half for as long as they remained lucid, and that they would be wakened for a dream report about a minute and a half after what appeared to be their final signal.
Efforts to correct a suspected flaw in OWI (i.e., research participants frequent-ly reported failure to signal when uncertain whether they were awake or asleep) led to development of the Revised Waking Instructions (RWI). RWI consisted essen-tially of the following stepwise procedure:
1. Signal whenever you think you might be asleep (as opposed to "asleep and dreaming");
2. Signal only when you are asleep and experiencing "imagery" of any sort (e.g., random or "hypnagogic" imagery); and
3. Signal only when you are asleep and truly "dreaming."
The Revised Waking Instructions thus constituted a sort of biofeedback-like procedure wherein verbal feedback from the experimenter at the time of waking the women from their signaling served to guide the subjects progression from one stage of learning to the next. Considerable attention was given to teaching the distinction between random, isolated imagery and true "dreams," which were defined as the presence of an ongoing, "hallucinated" scenario consisting a more or less linked series of events or experiences which the subject subjectively experienced as "real" rather than consciously made up or imagined.
Ultimately, four experimental conditions were established and compared:
A. Posthypnotic Suggestion (PHS) + Original Waking Instructions (OWI); N = 8.
B. Posthypnotic Suggestion (PHS) + Revised Waking Instructions (RWI); N = 7.
C. Original Waking Instructions (OWI) only; N = 8.
D. Revised Waking Instructions (RWI) only; N = 7.
There was no significant difference in the average level of hypnotic susceptibil-ity between any of these conditions (A = 8.6, B = 9.3, C = 8.1, D = 8.7), nor were there any differences between these conditions with respect to age or level of dream recall reported prior to the experiment.
The majority of participants in all conditions reported more than once for each lucid dream. A complex measure of interrater reliability of signal detection between the experimenters and blind raters was found to be comparable to that reported in earlier studies by Hearne (1978) and LaBerge (1980).
Lucid dreams which were reported during the study were divided into three types, based upon when ocular signaling actually occurred:
Unambiguous REM Lucid Dreams (UREM LD): Lucidity and ocular signaling oc-curred during unambiguous REM sleep;
Ambiguous REM Lucid Dreams (AREM LD): Lucidity apparently occurred during unambiguous REM sleep, but ocular signaling occurred immediately after arousal from REM sleep;
Non-REM Lucid Dreams (NREM LD): Lucidity and ocular signaling occurred dur-ing non-REM sleep.
Substantiation and discussion of the above classification system, especially that of "non-REM" lucid dreams, will be discussed elsewhere. It should be emphasized that all reports of random, isolated (hypnagogic) imagery were excluded from analysis.
Table 1 indicates the number of each type of lucid dream reported in the various conditions, with the number of subjects reporting each type indicated in parentheses. Note that since most subjects reported more than one type of dream, the total num-ber of subjects indicated in Table 1 is greater than the total number of subjects in the study (n = 30).
The basic unit of measure for analysis was the number of subjects in each con-dition who reported a lucid dream (only two lucid dream reports were not verified by ocular signaling). Table 2 indicates the number of subjects in each condition who reported at least one lucid dream of one or more of the three types.
When compared to the effects of Original Waking Instructions (Condition C) (binomial test and Fishers exact test), each of the three other conditions were inde-pendently significant at the .05 level or better (it should be stressed that these three conditions all remain significant even if non-REM lucid dreams are excluded from analysis. Thus, since OWI alone (Condition C) was not successful, PHS (Condition A), PHS + RWI (Condition D) were all independently successful with these former-ly nonlucid dreamers.
No statistically significant difference was found between any pairwise combi-nation of these three techniques. That is, PHS, RWI and their combination were all equally effective with respect to the number of subjects who reported lucid dreams. However, the five measures which are discussed below suggested that results asso-ciated with PHS (Conditions A and B) were qualitatively superior to those obtained with either form of Waking Instruction alone (Conditions C and D).
First, remember that participants sometimes signaled and were wakened prior to signaling from their first lucid dream. In what amounts to primarily the "PHS only" condition (Condition A), the first signal given by all successful subjects occurred during their first lucid dream. However, four of the six successful subjects using RWI only (Condition D), and all of the seven successful subjects using PHS + RWI (Con-dition B) signaled one or more times from nonlucid dream states (e.g., during hyp-nagogic imagery at sleep onset after initially going to sleep but prior to signalling from their first lucid dream. Thus PHS tended to require less "priming" than did RWI. That is, PHS tended to establish dream awareness directly, without ongoing intervention from the experimenter in the form of verbal feedback over the course of several wakenings. RWI, on the other hand, tended to first establish and refine sub-jects sensitivity to the subjective changes which occurred during sleep onset and to then "extend" this sensitivity into the ongoing awareness of dreaming.
Second, all REM-associated lucidity (i.e., UREM LDs and AREM LDs) in the non-PHS condition (Conditions C and D) occurred prior to three A.M. and no later than the third REM period of the night. Yet 6 of the 14 REM-associated lucid dreams in two PHS conditions (Conditions A and B) occurred between 3 a.m. and 7 a.m. and during the fourth to the sixth REM periods of the night. This was true despite the greater frequency of four or more REM periods having occurred in the non-PHS conditions than in the PHS-related conditions. It is thought that most spontaneous lucid dreaming occurs during the later REM periods of the night (Garfield, 1974; Hearne, 1978); LaBerge, 1980; van Eeden, 1969). Since late REM periods are typ-ically more emotionally involved than early REM periods, it may be "easier" to have a lucid dream during an early, less emotionally distracting REM period. PHS-induced lucidity may therefore be more "potent" than that induced via involvement with effective (i.e., "Revised") waking instructions.
In this connection, it was also noted that when compared with either PHS "alone" (Condition A) or RWI alone (Condition D), the combination of PHS and RWI (Con-dition B) tended to produce fewer REM LDs and to produce more NREM LDs. Thus the combination of PHS and RWI appeared to restrict or localize lucid dreaming to NREM sleep. This finding was attributed to the reinforcing effect of PHS on in-creased awareness of sleep onset phenomena which was so strongly emphasized in the Revised Waking Instructions. This emphasis may have tended to narrow the dreamers focus to NREM dreams.
A third measure of qualitative difference between PHS and non-PHS effects was that post experimental levels of lucid dream frequency were higher in the PHS related conditions (Conditions A and B) than in the non-PHS related conditions (conditions C and D). This was true both in terms of the number of subjects report-ing lucid dreams at various follow-up times and in terms of the number of post experimental lucid dreams reported per person.
Fourth, as indicated by the participants subjective reports and by the length of time between multiple ocular signals (when they occurred), lucidity tended to last longer within a given dream in the PHS related conditions than in the non-PHS related conditions.
And fifth, the lucid dreams of the PHS related conditions showed higher levels of intensity, personal relevance and personal involvement than did those of the non-PHS conditions. That is, affect and visual imagery tended to be more vivid and in-tense, experimentation within the dream and manipulation of dream content occurred more frequently, and dream content had more personal relevance and immediacy than was typically the case in the lucid dreams of those not exposed to PHS.
Nonetheless, it should be emphasized that with all three successful induction techniques (PHS, RWI and PHS + RWI), enduring benefits of lucidity were demon-strated on nightmares and other forms of negative affect within dreams. For exam-ple, one PHS subject was able to end a life history of recurrent nightmares through independent use of her lucidity training at home.
One final qualitative difference of note between PHS and WI related conditions was the manner in which lucidity was usually triggered. PHS tended to induce lu-cidity by altering dream content in a form which the individual was trained to recog-nize (e.g., inclusion of the dream symbol), while WI tended to alter the dreamers tendency to be critically aware of ongoing experience in general.
It is important to remember that the results of this study may not be widely generalizable, since the study sample represents only females in the upper fiftieth percentile of hypnotic susceptibility. Nonetheless, it is now apparent that dream lucidity is not simply an innate ability. Some hypnotically susceptible subjects can learn to dream lucidly within one night in the sleep laboratory and can maintain and even extend this learning well beyond the laboratory experience.
It also now appears that the range of sleep physiology which can accompany lucid dreaming includes NREM sleep. While NREM lucid dreams have not been prevalent in earlier laboratory studies, their presence in this study was probably due to the focus in Revised Waking Instructions on sleep onset phenomena combined with the experimenters clear communication to subjects that dreaming can occur in both REM and NREM sleep. Non-REM lucid dreams are clearly possible, and in some instances, their level of intensity and emotional involvement is comparable to or even exceeds that typically experienced in REM lucid dreams.
With respect to specific techniques, both Posthypnotic Suggestion and Revised Waking Instructions can produce lucid dreams in equal numbers of subjects, but PHS in conjunction with personal symbols appears to induce a more clinically potent and enduring form of lucid dreaming. Combining PHS and RWI appears to interfere with the optimal performance of both techniques.
It should also be remembered that signaling played a significant role in eliciting and sometimes even maintaining lucidity. Since signaling was also reported to help reactivate lucidity at home following the experiment, efforts to communicate with the waking world from the dream state may be an important key to eliciting dream lucidity.
And finally, with respect to clinical and personal applications, the induction of lucid dreaming shows considerable promise, since it can establish and enhance a new level of active cooperation between waking and dreaming consciousness. Given the apparent occurrence of ocular signaling in immediate proximity to "delta wave" (Stage 3 and 4) sleep, lucidity training may even have potential for the treatment of night terrors and sleep walking.
Garfield, P. (1974). Creative dreaming. New York: Ballantine.
LaBerge, S. (1980). Lucid dreaming: An exploratory study of consciousness during sleep. Doctoral Dissertation, Stanford University. (University Microfilms International, 8024691).
van Eeden, F. (1913). A study of dreams. In C.T. Tart (Ed.), Altered states of consciousness. Garden City, New York: Anchor Books, Doubleday & Co., Inc.
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