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Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, LABA ABACS, LLC. Boston, MA, U.S.A.

Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

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Page 1: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Toilet Training Children with AutismKsenia Kravtchenko, M.S., BCBA, LABA

ABACS, LLC.

Boston, MA, U.S.A.

Page 2: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Agenda

Objectives

General overview of toileting issues

Literature review

Developing a toileting plan

Implementing plan

Scenarios

Questions

Page 3: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Objectives

Page 4: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Objectives

Identify common toileting problems

Discuss toileting strategies

Assess readiness for toilet training

Develop toileting plan

Implement a plan

Make adjustments based on progress

Page 5: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

General Overview

Page 6: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Common Toileting Problems

Urine and/or bowel

movement accidents

Accidents at night

Success in some settings,

not others

Dependence on others

Page 7: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Prevalence – Children with ASD

Medical Concerns

• Significantly higher rates of gastrointestinal conditions than peers (McElhanon, McCracken, Karpen, & Sharp, 2014)

• Greater risk of incontinence issues and lower urinary tract symptoms (von Gontard, Pirrung, Niemczyk, & Equit, 2015)

Page 8: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Prevalence – Children with ASD

Toileting Accidents• Daytime

• 25% compared to 4.7% of age-matched peers (mean age: 11.3 and 10.7) (von Gontard et al., 2015)

• Nighttime

• 27.5% (ages 2-16 years) (Williams, Sears, & Allard, 2004)

• 30% (mean age: 11.7) (von Gontard et al., 2015)

Page 9: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Importance of Toilet Training

Social

Hygiene

Time consuming

Physical Discomfort/Irritation

Cost

Exclusion from social and educational opportunities

Page 10: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Literature Review

Page 11: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Azrin & Foxx (1974) – Toilet Training in

Less than a Day

Overview

• Quick method for toilet training (p. 34)

• Incorporates ABA techniques

• Has been used for different ages and skill levels (p. 33)

• Over 2 million copies sold

• Based on Foxx and Azrin (1973) study with 34 children (20 months to over 4-years-old) (p. 33)

Page 12: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Azrin & Foxx (1974) – Toilet Training in

Less than a Day

General Teaching Plan

• Gather materials (p. 39)

• Use variety of reinforcers for motivation (p. 40)

• Fluids (p. 51, 71)

• Use simple instructions (p. 40)

• Practice walking to chair (p. 40)

• Use doll as model (p. 54)

Page 13: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Azrin & Foxx (1974) – Toilet Training in

Less than a Day

General Teaching Plan

• Peer teacher, if available (p. 40)

• Check for dry pants every few minutes (p. 69)

• Take to bathroom every 15 minutes to start, then less frequently (p. 75)

• Prompt earlier if child indicates need to void (p. 79)

• Sitting for 10 minutes at first, then no more than 5 minutes (p. 77)

Page 14: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Azrin & Foxx (1974) – Toilet Training in

Less than a Day

General Teaching Plan

• Praise and reinforcement for correct toileting behavior (p. 82-87)

• Social disapproval for accidents (p.98-99)

• Positive practice (p. 99-102)

• Require to change own clothes (p. 103)

Page 15: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Greer, Neidert, & Dozier (2016)

Overview

• Purpose• Evaluate different strategies

• Increase initiations, increase voids in toilet, decrease toileting accidents

• Participants• 20 children in school setting

• 19-39 months

• 1 child autism

Page 16: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Greer, Neidert, & Dozier (2016)

General Teaching Plan

• Dry pants checks

• Prompt to request bathroom

• 3-minute sit or until void

• Praise for being dry, using toilet

• Neutral reaction following toileting accident

Page 17: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Greer, Neidert, & Dozier (2016)

Comparison

• Underwear vs. pull-up

• Taking to the bathroom frequently (30 minutes vs. 90 minutes)

• Use of preferred items to reinforce dry pantsResults

• Using underwear improved toileting progress

• Taking child to bathroom more often or reinforcing dry pants while wearing pull-ups did not improve toileting progress

Page 18: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

First Steps

Page 19: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

First Steps

• Potential warning signs: very frequent urinations, infrequently dry, pain associated with urine voids or bowel movements (Azrin & Foxx, 1974, p. 50)

Rule out medical concerns before starting plan

• Age, bladder control, physical readiness

• Interfering behaviors, tolerance for transitions and/or bathroom

• Ability to follow simple instruction

Determine readiness (Azrin & Foxx, 1974, p. 43-45)

• Ask school, caregivers

Review strategies already tried with child

Page 20: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario

• No medical concerns

Rule out medical concerns before starting plan

• Transitions cause self-injury and aggression

Determine readiness

• No experience with toilet training

Review strategies already tried with student

George – 4-years-old

Should you start toileting training? No

Page 21: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario

• No medical concerns

Rule out medical concerns before starting plan

• No interfering behavior

Determine readiness

• Toileting plan in school has not been effective

• No toileting progress in 6 years

Review strategies already tried with student

Erin – 9-years-old

Should you start toileting training? Yes!

Page 22: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Developing a Plan

Page 23: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Considerations

Setting

Who will be implementing plan?

Time/resources

Schedule

Communication

Materials

Taking Data

Page 24: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Setting

Page 25: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Setting

• Toileting accidents may not be tolerated

• Other priorities such as academic work

Considerations

• May have to start in one setting, and then generalize to others

• Example: First during school, then once progress made, try at home

Effect on plan

Page 26: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Who Will be

Implementing Plan?

Page 27: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Who will be implementing plan?

• Depends on availability/limitations

• Depends on willingness to participate

Ideal to get everyone on board

• May have to start with only one person implementing, then include others when progress is made

• Example: First with ABA therapist, then once progress made, parents can try

Effect on plan

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Schedule

Page 29: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Schedule

• Record approximately how often child voids in toilet/has accident

• Take to bathroom more often than average time between voids/accidents

Bathroom trip schedule based on how often child voids

• Depends on child

• Often 30 seconds-5 minute, or until void occurs

Length of sitting on the toilet

Page 30: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Schedule

• More likely they will need to void sooner

More often after fluids

• If accidents still occurring, take more often

• If accidents not occurring, take less often

Change schedule based on progress

• Change how often bathroom trips occur

• May have to change schedule if time is limited

Effect on plan

Page 31: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Time/Resources

Page 32: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Time/Resources

• One or multiple

• How many other people will need bathroom?

Bathrooms

• Number of adults available

• Number of other children in care

People

• May require you to change the bathroom trip schedule if time/resources limited

Effect on Plan

Page 33: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Communication

Page 34: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Communication

Prompt to Request

Vocal

Nonvocal

“Bathroom!”

Page 35: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Materials

Page 36: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Materials

Toilet/potty chair

Fluids (e.g., water)

Timer/clock

Data sheets

Potential reinforcers and visuals

Underwear, pull-ups/diapers

Change of clothes and wipes

Page 37: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Underwear vs. Pull-ups

Wearing underwear instead of pull-ups or diapers can

improve toileting performance (Greer et al., 2016; Tarbox

et al., 2013)

Underwear only during toilet training sessions and pull-

ups/diapers when toilet training is not in place

Page 38: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Underwear Only vs. with Pants

Easier to tell when accident occurs

Consider privacy/setting

Page 39: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Toilet/Potty

Choose between using toilet or potty chair

Some potty chairs signal when void occurs (Azrin & Foxx,

1974, p. 52)

Size of the child

Availability/resources

Page 40: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Toileting Consideration for Boys

Sitting vs. standing for boys

Size of the child

Bowel movements under control

Page 41: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Fluids

Increase need to go to bathroom during training (Azrin &

Foxx, 1974, p. 51, 71-73)

Make fluids readily available

Provide water bottle

Ask if thirsty

Page 42: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Timer/Clock

Keep track of when voids in the toilet or toileting

accidents occur

Reminder for next scheduled dry pants check or bathroom

trip

Page 43: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Urine Alarms

Page 44: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Reinforcers

Use highly preferred items (Azrin & Foxx, 1974, p. 40, 50-51)

Preference assessments

Ask

Observe

Offer choices

Preferred items reinforcers

Page 45: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Reinforcers - Examples

Page 46: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

What to Reinforce?

Remaining Dry

Urine void or BM on

toilet

Requesting Bathroom

Page 47: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

When to Reinforce?

Immediately after behavior

“You’re dry! Good job!”

Every time

Page 48: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Use a Visual

Visuals can help with motivation

Page 49: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Use a Visual

Visuals can help with motivation

Page 50: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Change of Clothing/Wipes

Extra underwear and clothes available in the

bathroom

Wipes for cleaning up

Gloves, if necessary

Page 51: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Taking Data

Page 52: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Taking Data

Fluid Intake

Dry/Wet

Time of bathroom trip, accidents, voids in toilet

Bathroom Initiations

Behaviors indicating child needs bathroom

Obtain report from other settings

Page 53: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Sample Data Sheet

Page 54: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Sample Data Sheet

Page 55: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Implementing Plan

Page 56: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Beginning Training

Write out toileting plan and make it easily accessible

Train everyone who will be implementing it

Collect all materials

Page 57: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Start of Session

Gather materials

Set up data sheet

Change child into underwear

Start timer

Page 58: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

During Session

Make fluids available

Follow dry pants check and bathroom trip schedule

Prompt and reinforce request

Reinforce dry pants and voids in the toilet

If accident occurs, neutrally say, “wet” and then clean up the accident

Page 59: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

End of Session

Change into pull-up, if needed

Summarize and graph data

Fill out toileting log

Page 60: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Sum and Graph Data

Sum (add up) # of voids, toilet accidents, initiations

Divide each # by total number of bathroom trips

Multiple by 100 to get %

6 Voids

6 Bathroom TripsX 100 = 100% trips with voids

Page 61: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Sum and Graph Data

Sum (add up) # of voids, toilet accidents, initiations

Divide each # by total number of bathroom trips

Multiple by 100 to get %

2 Accidents

8 Bathroom TripsX 100 = 25% trips with

accidents

Page 62: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Graph – Hypothetical Data

Page 63: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Ongoing Evaluation of Progress

Look at data regularly

Make changes based on whether:

Progress made

Progress not madeOR

Page 64: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Ongoing Evaluation of Progress

• Take to bathroom less often

• Try the plan without reinforcers

Progress made

• Take to bathroom more often

• Reassess/change reinforcer

Progress not made

Page 65: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Graph – Hypothetical Data

Page 66: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Graph – Hypothetical Data

Page 67: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenarios

Page 68: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Ana

Wearing pull-ups all day

Drinks juice at lunch time only

No progress made per caregiver report

Page 69: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Ana

• Use underwear during training

Wearing pull-ups all day

• Make fluids accessible through day

Drinks juice at lunch time only

• Take and graph data

• Reassess schedule and reinforcers

No progress made per caregiver report

Page 70: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Natasha

Voids in toilet and stays dry

Never initiates going to the bathroom

Does not vocally communicate

Page 71: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Natasha

• No change needed

Voids in toilet and stays dry

• Observe for behaviors showing that she needs to void

• Prompt request for bathroom

Never initiates going to the bathroom

• Teach sign for bathroom

• Teach to hand over bathroom picture

Does not vocally communicate

Page 72: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Jordan

• Compare strategies in school and home• Bathroom schedule

• Underwear/pull-up

• Reinforcers

• Fluids available

• Make adjustments to home plan

Progress in school, not at home

• Create toileting log for school and home

• Share log each day

Data not collected

Page 73: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Scenario – Jordan

• Compare strategies in school and home• Bathroom schedule

• Underwear/pull-up

• Reinforcers

• Fluids available

• Make adjustments to home plan

Progress in school, not at home

• Create toileting log for school and home

• Share log each day

Data not collected

Page 74: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

Questions?

Page 75: Toilet Training Children with Autism · Toilet Training Children with Autism Ksenia Kravtchenko, M.S., BCBA, ... Objectives General overview of toileting issues ... Change schedule

References

Azrin, N. H. & Foxx, R. M.(1974). Toilet training in less than a day. New York, NY: Pocket Books.

Foxx, R. M. & Azrin, N. H. (1973). Dry pants: A rapid method of toilet training children. BehaviourResearch and Therapy, 11, 435-442. doi:10.1016/0005 7967(73)90102-2

Greer, B. D., Neidert, P. L. & Dozier, C. L. (2016). A component analysis of toilet-training proceduresrecommended for young children. Journal of Applied Behavior Analysis, 49, 69–84.doi: 10.1002/jaba.275

Kroeger, K. A. & Sorensen-Burnworth, R. (2009). Toilet training individuals with autism and otherdevelopmental disabilities: A critical review. Research in Autism Spectrum Disorders, 3, 607-618.

McElhanon, B.O., McCracken, C., Karpen, S., & Sharp, W.G. (2014). Gastrointestinal symptoms inautism spectrum disorder: A meta-analysis. Pediatrics, 133(5). Doi: 10.1542/peds.2013-3995

Tarbox, R. S. F., Williams, W. L., & Friman, P. C. ( 2004). Extended diaper wearing: Effects oncontinence in and out of the diaper. Journal of Applied Behavior Analysis, 37, 97–100. doi:10.1901/jaba.2004.37-97

Williams, P.G., Sears, L.L., & Allard, A.M. (2004). Sleep problems in children withautism. Journal ofSleep Research, 13(3), 265-268. doi: !0.1111/j.13652865.2004.00405.x