**Conflict of interest**

Behaviour Analyst (BCaBA) requires a verified undergraduate degree. The Board Certified Behaviour Analyst (BCBA) is a master's level qualification and the Board Certified Behaviour

All certificants must meet entry requirements, complete the required verified behaviour analysis course sequences at University, and fulfil supervised experience requirements before applying for eligibility to take the appropriate extensive examination. In addition to the various levels of certification the BACB has developed a Professional and Ethical Compliance Code that applies to all certificants. The code requires behaviour analysts to practice only in the areas of their training, continue to develop areas of expertise through continued professional development activities, and use and contribute to the evidence-base for behaviour analytic methods. The BACB also developed a good practice guide for autism interventions

The coursework content of BACB verified course sequences (VCS) includes ethics, functional assessment and functional analysis, interventions and applications, experimental analysis, and conceptual issues. The number of hours for coursework and supervised experience differs depending on the level of certification sought. Supervisors are required to be BCBAs and

The application of the science of behaviour analysis has provided a range of evidence-based interventions to support individuals on the autism spectrum. Implementation and funding for these interventions differ widely across the world. They are typically home-, school-, or clinic-based, usually starting with a one-to-one therapist-to-child ratio and moving to group work as soon as possible. Outcomes have been very positive and social validity and satisfac-

This chapter offered a brief description of the scientific discipline of behaviour analysis, summarised the present state of knowledge around autism aetiology, diagnosis and prevalence, and focussed on applied behaviour analysis (ABA)-based interventions for children with autism. Finally, the requirements for professionals working in the field, i.e., Board Certified

Applied behaviour analysis-based interventions for autism clearly have a large evidencebase of effectiveness. The continued failure of governments across Europe to recognise this has left a vacuum, that all too often is filled by fads and fictions [57]. To avoid misinformation and ensure that these interventions are delivered with fidelity, well-trained staff are necessary. Parents of children with autism require and deserve the best information and supports

Although policy reform in the USA is still somewhat inconsistent across states and, yet, many are left without financial support, there is reason for optimism that offers a platform from which to lobby for further access to ABA-based interventions for all people with autism who need it.

Analyst-Doctoral (BCBA-D) is the doctoral level designation.

and publishes translations of BACB resources.

have completed specified supervisor training.

tion with the outcomes has been high.

Behaviour Analysts (BCBA), were described.

**6. Conclusions**

16 Behavior Analysis

available.

Both authors declare they have no conflict of interest in publication of this chapter.
