The Science Behind Pavlok
Pavlok uses electrical stimulation to change smokers' behavior by delivering a mild shock when they reach for a cigarette, gradually reducing their urge to smoke over time.

Aversion Therapy
Pavlok is built on the groundwork of 80+ years of scientific evidence. We are in the process to file for FDA-clearance and run clinical tests, but these have not been completed and we are not a medical device.
To break bad habits, Pavlok uses the science of Aversion Therapy — the most effective treatment for breaking bad habits ever utilized.
Aversion therapy is Pavlovian Conditioning — associate the habit you want to stop, with a negative stimulus (like Pavlok’s zap) for a period of time, for a few days in a row. Rapidly, the brain learns to associate the two stimuli together, and stops *liking* the habit.
If you or a friend experienced excessive alcohol intake or food-related sickness, you likely understand this. When you get that sick, your reptile brain can instantly create a connection, causing you to stop liking that type of alcohol or food.

Studies
Pavlok is in the process of developing and conducting new studies for a variety of habits. We have begun in one project conducted in collaboration with University of Massachusetts at Boston, Pavlok was tested on a group of 8 people as a smoking cessation aid.

Smoking Cessation with Pavlok
A research project, conducted at University of Massachusetts, Boston.
Cigarettes and second-hand smoke are common causes of a multitude of medical problems and smoking is a notoriously difficult habit to break. This report is designed to increase awareness of smoking cessation options and improve effectiveness of cessation techniques. A complete literature review of smoking cessation options was conducted. Aversive conditioning — pairing an undesired action with a slight electrical shock — was identified as a successful smoking treatment in several studies from the past.
In this report, smokers used Pavlok, a product that allows the user to self-administer a slight electric shock. The subjects averaged 10-20 cigarettes per day previously, and were asked to self-administer a shock at every puff of a cigarette for a period of two weeks. Subjects also were offered social support throughout the testing period.
At experiment end, 75% of subjects had become completely smoke-free for at least a week, and 25% had cut down their cigarette intake by at least half. Data obtained from this test group indicates aversive conditioning is an effective method of smoking cessation and is extremely effective when paired with individualized social support.
Download the full paper21 Studies on Aversion
For over 80 years, doctors and scientists have dedicated their efforts to studying the efficacy of electric shock in behavior modification. Through rigorous testing, these researchers present their findings in peer-reviewed journals, which serve as valuable references for subsequent studies. This post comprises a compilation of scientific reports from renowned academic and medical institutions worldwide. Within, you'll find 21 article summaries that offer a glimpse into the robust body of research underpinning the development of Pavlok.
01
Up to 61.4% of subjects quit smoking within 5 days
A comprehensive follow-up study was conducted on 832 clients who underwent a commercial stop smoking program, approximately one year after treatment. The program utilized five days of aversive conditioning for various smoking behaviors, alongside educational counseling and a six-week support phase with weekly support groups and one conditioning reinforcement treatment in the second week. The clients were contacted around 13.7 months after completing the treatment, and 52% of them had achieved total abstinence from cigarettes since their program "graduation."
The study revealed that the most significant predictor of success or failure was whether the client returned to a home with a smoker. Among those returning to a nonsmoking home, 61.4% of men and 60.2% of women were successful in staying smoke-free.
In contrast, 70.2% of those who returned to a smoking household resumed smoking.
Overall, the treatment process appeared to be complication-free and yielded successful outcomes for the majority of clients. To potentially enhance the results further, simultaneous treatment of all household smokers could be considered.
Reference: Journal of Substance Abuse Treatment, Long Term Outcome of Clients Treated in a Commercial Stop Smoking Program, Vol. 5. pp. 33-36, 1988
02
81.8% of nail biters have significant nail growth with electric shock therapy
In this study, 61 subjects (31 males and 30 females) with an average age of 19.75 years and a history of nail-biting for about 12 years were randomly assigned to one of four groups:
- Shock
- Negative Practice
- Bitter substance
- Attention-placebo control.
The shock group received faradic shock using a generator capable of delivering 200 V at 10 mA. Half of the subjects in each group were asked to self-monitor their nail-biting during treatment.
All groups experienced increased nail growth, with no significant difference among them. However, subjects who self-monitored their nail-biting showed significantly greater nail growth (p<.05) compared to those who didn't self-monitor. Three months later, a significantly higher proportion of subjects in the three aversion treatment conditions had either stopped biting their nails or reduced the frequency (p<.05) compared to the control condition.
Furthermore, there was a noteworthy increase in awareness of nail-biting among individuals who still engaged in the habit (p<.01), with self-monitoring subjects experiencing this increased awareness primarily. These findings suggest that awareness plays a crucial role in reducing nail-biting behavior.
Reference: Vargas, John M., and Vincent J. Adesso. ‘A Comparison Of Aversion Therapies For Nailbiting Behavior’. Behavior Therapy 7.3 (1976): 322-329. Web.
03
Aversion Study Results In Sustained Weight Loss of 9.17 lbs
Favorite foods (CS) were paired with noxious odors (UCS) to help overweight subjects achieve and maintain weight loss.
The average age of subjects was 39.56 years with a range of 18-60 years and the average weight was 181.67 lbs with a range of 152-237 lbs.
All subjects had been defined as “overweight” according to the New Weight Standards (Statistical Bulletin, November, 1959) and also by their physicians. After the 9-week conditioning period, a significant (obtained p = 0.002, significant at p<0.05) average weight loss for the six experimental subjects of 13.33 lbs compared with an average weight loss of 1.00 lb for the six control subjects was reported.
After 48 weeks, the experimental subjects had an average weight loss of 9.17 lbs, while the control group had a weight gain of 1.33 lbs.
Reference: Foreyt, John Paul, and Wallace A. Kennedy. ‘Treatment Of Overweight By Aversion Therapy’. Behaviour Research and Therapy 9.1 (1971): 29-34. Web.
04
Skin scratching and hair picking disappear completely with 20 minute sessions
Behaviour therapy provides important psychotherapeutic possibilities for the treatment of dermatological disorders. Compulsive scratching and trichotillomania can be treated by aversive conditioning.
In documented case a man aged 33 suffered from severe lichen simplex on the scrotum, thighs and ankles, which had been present for 4 years and for which he had been admitted to the clinic three times, without any lasting result.
The patient was seen once a day for a 20 minute session. He was instructed to bring his hand to scratch at a sign from the therapist. At the moment his hand reached site he received an unpleasant, though not painful, electric shock via electrodes on the moving hand. He then had to draw back his hand and say aloud, ‘don’t scratch’. After 19 days of treatment the scratching disappeared completely.
Reference: BAR, LOUIS H. J., and BEN R. M. KUYPERS. ‘Behaviour Therapy In Dermatological Practice’. Br J Dermatol 88.6 (1973): 591-598. Web.
05
12 hours of treatment can extinguish a 12 yr habit
When contrasted with other psychiatric treatments the duration of aversion therapy necessary to break a chronic habit such as compulsive gambling is extremely short.
Case 1 required only 12 hours treatment to extinguish a behaviour pattern which had persisted for 12 years.He showed no tendency to resume gambling for 18 months. He relapsed once after a domestic upheaval and after losing his job. He was readministered for four “booster” treatments, during which he showed marked reluctance to gamble.
Apart from this single relapse he has not returned to gambling for more than two years. Mainly because of its convenience and practicability, electrical aver- sion therapy is now tending to replace all other aversion techniques (1, 38.)
Reference: Barker, J.C., and Mabel Miller. ‘AVERSION THERAPY FOR COMPULSIVE GAMBLING’. The Lancet 287.7435 (1966): 491-492. Web.
06
The Elimination of Chronic Cough by Electric Shock
The study presents a case in which aversion therapy was successfully used to eliminate a chronic cough in a 15 yr old boy. Treatment included electric shock aversion therapy employing a response suppression shaping paradigm to remove the cough, and ancillary family treatment to alter the reinforcement pattern which maintained the inappropriate behavior.
The subject has been free of cough for 1 1/2 yr since treatment. Significant aspects of the case relating to the use of aversion techniques are discussed. This paper is based in part on a presentation given at the Fifth Annual Meeting of the Association for the Advancement of Behavior Therapy, Washington, D.C., September, 1971.
Reference: Barney Alexander, A. et al. ‘The Elimination Of Chronic Cough By Response Suppression Shaping’. Journal of Behavior Therapy and Experimental Psychiatry 4.1 (1973): 75-80. Web.
07
1 Year Follow Up: 66.7% of Smokers Who Complete 5 Shock Sessions Still Not Smoking
Electric aversion was administered to 14 cigarette smokers. Six of the nine subjects who completed the treatment were still abstinent at one-year follow-up.
The overall average of 21.5 cigarettes on the day before treatment dropped to an average of 1.4 cigarettes per day after the third aversion session and most patients stopped smoking within five sessions. It is concluded that electric aversion is a powerful suppressor of cigarette smoking.
Reference: Russell, M. A. H. ‘Effect Of Electric Aversion On Cigarette Smoking’. BMJ 1.5688 (1970): 82-86. Web.
08
In 3 Sessions Electric Shock Creates Inhibition of Craving For Prescription Drugs
It seems likely that an important reason for the limited success of aversion treatment of drug addiction has been that the aversion is applied only to extrinsic stimuli associated with the drug. No attempt is ordinarily made to combat the endogenous habit. In the present experiment a subject with a Demerol (Pethidine) addiction of 3 years standing was instructed to give him- self a severe shock from a portable apparatus whenever he felt a desire for the drug arise endogenously. On three occasions he gave himself 4, 3 and 2 shocks respectively, dispelling the craving. For a period of 12 weeks the patient remained free from any but minor cravings that he could easily control.
Reference: Wolpe, Joseph. ‘Conditioned Inhibition Of Craving In Drug Addiction: A Pilot Experiment’. Behaviour Research and Therapy 2.2-4 (1964): 285-288. Web.
09
Aversion Therapy and Sensory Modalities: Clinical Impressions
Clinical findings suggest that the results of aversion therapy may be enhanced by choosing aversive stimuli which match the specific modalities under treatment. “White noise” was most effective in reducing auditory hallucinations; tactile stimuli (electric shocks) were most effective with motor compulsions; and an unpleasant olfactory-gustatory stimulus (an especially foul mixture of smelling salts) worked best with compulsive eaters. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
Reference: Lazarus, Arnold A. ‘AVERSION THERAPY AND SENSORY MODALITIES-CLINICAL IMPRESSIONS’. Perceptual and Motor Skills 27.1 (1968): 178-178. Web.
10
Aversion Therapy in the Treatment of Trichotillomania: A Case Study
This paper presents a single case study of a patient with compulsive hair- pulling (trichotillomania) of 16 years’ duration, who was successfully treated using electric aversion therapy. All previous attempts at treatment and self- help had been unsuccessful.
A behavioural self-control programme was tried initially with some success, but the progress was not maintained following an unplanned break in treatment and this treatment was ineffective when re- instated. Electric aversion therapy eliminated hair pulling almost immediately and the results were maintained on follow-up, with the exception of a minor relapse at a time of stress.
Reference: Crawford, David A. ‘Aversion Therapy In The Treatment Of Trichotillomania: A Case Study’. Behavioral Psychology 16.01 (1988): 57. Web.
11
Aversive Shock Analysis Physical Danger, Emotional Harm, Effectiveness and “Dehumanization”
Four major objections to the use of faradic stimulation are reviewed and re- sponded to. It is concluded that aversive stimulation is no more dangerous physically or emotionally than traditional forms of treatment, that some aversive procedures have provided controlled evidence of effectiveness, and that charges of dehumanization are invalid.
Reference: Tanner, Barry A. ‘Aversive Shock Issues: Physical Danger, Emotional Harm, Effectiveness And “Dehumanization”’. Journal of Behavior Therapy and Experimental Psychiatry 4.2 (1973): 113-115. Web.
12
The Control of Violence & Aggression Through Electric Shock
This study deals with the use of faradic shock administered as a punishment to curb assaultive and violent behaviors in a 31-year-old, hospitalized, chronic schizophrenic female. Three levels of behaviors were chosen for modification: 1) aggressive acts, 2) verbal threats, and 3) accusations of being persecuted and abused. The aversive conditioning approach was employed for each of these levels in a stepwise fashion, with each successive level being included as punishable offenses once effective control over behaviors on the previous level had been demonstrated.The results indicated that a marked reduction in the incidence of the behaviors on all three levels was accomplished by means of this treatment approach. Shortly after instituting the punishment program for accusatory verbalizations, the patient began to show appropriate, socialized behavior, which continued throughout the remainder of the program. Moreover, the patient's weekly behavior rating scores indicated a significant improvement in general functioning over time following the initiation of the aversive therapy program.
Reference: Ludwig, Arnold M. et al. ‘THE CONTROL OF VIOLENT BEHAVIOR THROUGH FARADIC SHOCK’. The Journal of Nervous and Mental Disease 148.6 (1969): 624-637. Web.
13
In 10 Weeks Electrical Aversion Therapy Cured A Chronic Heroin User
A 23-yr-old male graduate student who had been using heroin for 3 yr was treated with electrical aversion conditioning. Treatment was carried out in twenty 20-minute sessions over approximately 10 weeks. The drug taking behavioral sequence was broken into discrete phases which the patient imagined and verbalized. An 8-month follow-up has shown him to be drug free.
Reference: Lubetkin, Barry S., and Steven T. Fishman. ‘Electrical Aversion Therapy With A Chronic Heroin User’. Journal of Behavior Therapy and Experimental Psychiatry 5.2 (1974): 193-195. Web.
14
Aversion Therapy Is More Effective Than Other Common Treatments
Operant (N = 11), aversion (N = 12), and transactional analysis (N = 12) approaches to the development of self control in excessive cigarette smoking were compared with each other and with a no-treatment control group (N = 15). 10 group treatment sessions were administered to Ss assigned to each of the treatment groups. After treatment and a 1-mo follow-up period, the smoking rates of all treatment conditions were significantly lower than the control group (p < .001). No significant treatment, therapist, or interactional differences or indications of symptom substitution were found. (32 ref.) (Psy- cINFO Database Record (c) 2012 APA, all rights reserved)
Reference: Ober, D. C. ‘Modification Of Smoking Behavior.’. Journal of Consulting and Clinical Psychology 32.5, Pt.1 (1968): 543-549. Web.
15
9 of 20 Nail Biters Quit On Day 1 & 13 of 20 Quit By Day 4
Twenty unpaid volunteers were recruited through advertisements and notices, with a majority being UCLA students. Most participants reported a history of nail-biting since early teen or preteen years, with occasional attempts at self-control and intermittent periods of abstinence. Two devices were used, offering a choice of shock intensity. The aversive stimulation was utilized in the study to achieve suppression.
The chronic nailbiters, instructed to carry a portable shock device, were prompted to use it when placing a finger in the mouth or on the lips, and to discontinue the behavior upon realization. The procedure proved highly effective; in 9 out of 20 cases, no biting was reported from the first day. In 4 other cases, there were no reports of biting after 4 days. Additionally, all visual checks of nails aligned with the subject reports.
Reference: Bucher, Bradley D. ‘A Pocket-Portable Shock Device With Application To Nailbiting’. Behaviour Re- search and Therapy 6.3 (1968): 389-392. Web.
16
Training Device Takes Chronic Hair Pulling To Near-Zero Levels
The chronic hair pulling of a 36-year-old woman with moderate mental retardation was initially treated with a simplified habit-reversal (SHR) procedure that consisted of awareness training, competing response training, and social support. When SHR did not produce large and sustained reductions in hair pulling, an awareness enhancement device was added, and it reduced hair pulling to near-zero levels in two settings. The results are discussed, and directions for future research with this device are provided.
Reference: Rapp, J T, R G Miltenberger, and E S Long. ‘Augmenting Simplified Habit Reversal With An Awareness Enhancement Device: Preliminary Findings.’. Journal of Applied Behavior Analysis 31.4 (1998): 665- 668. Web.
17
An Automated Aversion Device in the Treatment of a Compulsive Handwashing Ritual
A 49-yr-old male with a long history of compulsive handwashing was treat- ed by the implementation of a self control procedure. This turned out to be effective only when a powerful external reinforcer (shock) was added to the procedure to increase the patient’s capacity for initiating self-control. Ritualistic handwashing had virtually ceased after 42 days and remained absent at 12 months’ follow-up.
Reference: Le Boeuf, Alan. ‘An Automated Aversion Device In The Treatment Of A Compulsive Handwashing Ritual’. Journal of Behavior Therapy and Experimental Psychiatry 5.3-4 (1974): 267-270. Web.
18
Faradic Disruption of Obsessive Ideation in the Treatment of Obsessive Neurosis
Faradic disruption of verbal phrases and mental images was used with five chronic obsessive patients in an attempt to reduce obsessive ideation connected with their obsessive fears, doubts and horrific temptations and to reduce or eliminate their compulsive or ritualistic behavior such as handwashing and checking.
As a result, three of the five patients were vastly improved and one experienced moderate improvement.
Reference: Kenny, F.T., L. Solyom, and C. Solyom. ‘Faradic Disruption Of Obsessive Ideation In The Treatment Of Obsessive Neurosis’. Behavior Therapy 4.3 (1973): 448-457. Web.
19
Sadistic Fantasies Modified by Aversive Conditioning and Substitution: A Case Study
A case study involving unpleasant electric shocks as the consequence of sadistic fantasies seems to have successfully helped to suppress or extinguish them while incompatible “normal” sex fantasies were strengthened.
Reference: Mees, H. ‘Sadistic Fantasies Modified By Aversive Conditioning And Substitution: A Case Study’. Behaviour Research and Therapy 4.1-2 (1966): 317-320. Web.
20
Electric Shock Selectively and Retroactively Strengthens Your Memory
In this study, we demonstrate that in humans, information is selectively consolidated when conceptually related data, presumably represented in a shared neural substrate, becomes salient through an emotional learning experience. Specifically, memory for neutral objects showed enhancement when other objects from the same category were paired with a shock.
These retroactive enhancements resulting from emotional learning were evident after a consolidation period, but not in an immediate memory test or for items that were strongly encoded before fear conditioning.
These findings present novel evidence for a generalized retroactive memory enhancement, wherein inconsequential information can be retroactively recognized as relevant and, consequently, selectively remembered if conceptually related information gains salience in the future.
Reference: Davichi, Lila, and Dunsmoor, Joseph E., and Murty, Vishnu P., and Phelps, Elizabeth A. ‘Emotional learning selectively and retroactively strengthens memories for related events’. Nature (2015). Web.
21
Shock Treatment: 84.2% of Marijuana Smokers Quit & Their Collective IQ Increases By 6%
Twenty-two chronic marijuana smokers, comprising 16 males and 6 females with a mean age of 29.8 years, participated in a smoking cessation clinical trial. On average, they had been smoking marijuana for 13.7 years and consumed 3.4 marijuana cigarettes daily. The clinical trial involved five consecutive days of 50-minute aversion therapy sessions, utilizing THC-free marijuana with techniques like faradic, rapid smoking, and quick puffing. This was followed by three weekly 60-minute group cohort sessions in self-management counseling, spanning a four-week treatment period.
By the end of the five-day aversion therapy, all 22 subjects reported achieving abstinence. At the conclusion of the clinical trial, 19 out of 21 subjects (90.5%) were still abstinent. Follow-ups at six months and twelve months post-treatment revealed that 15 out of 20 subjects (75.0%) and 16 out of 19 subjects (84.2%), respectively, remained abstinent.
The average number of daily marijuana cigarettes smoked significantly decreased from a baseline of 3.40 to 0 after aversion therapy, .07 at the conclusion of the clinical trial, .26 at six months post-treatment follow-up, and .23 at the twelve-month post-treatment follow-up.
The mean scores on the Shipley Institute of Living Scale were IQ 106 and CQ 92 at pretreatment, increasing to IQ 112 and CQ 104 post-treatment.
Based on these results, the investigators concluded that the treatment procedure shows promise as a marijuana smoking cessation program.
Reference: Davichi, Lila, and Dunsmoor, Joseph E., and Murty, Vishnu P., and Phelps, Elizabeth A. ‘Emotional learning selectively and retroactively strengthens memories for related events’. Nature (2015). Web.
You still don’t have yours ?
Embark on Your Journey to Better Habits Today with Pavlok.
