Recent international regulatory reforms have put more responsibility on auditors for detecting financial statement fraud. The recent changes to international auditing standards make it compulsory for members of the audit team to discuss the susceptibility of an entity to fraudulent misstatements at the audit planning stage. These standards do not stipulate the format of these group discussions, nor provide any explicit guidelines on how to carry out effective discussions. This dissertation reports on two studies that examine different discussion techniques which could lead to a better identification of audit fraud risks at the audit planning stage, and may in turn help in fraud detection. Study One tests whether two enhanced forms of interacting group processes (brainstorming guidelines and premortem instructions) have advantages over an interacting group (without brainstorming guidelines). The brainstorming group is provided with Osborn???s (1957) original brainstorming guidelines. Premortem is a variation of the mental simulation idea developed by Klein (1999) invoking a scenario where participants actively search for a flaw in their plans. The auditors in both the brainstorming group treatment and the premortem group treatment generated a larger number of potential frauds than the interacting group treatment. These results were robust across a range of dependent variables used to measure quantity and quality of fraud items. The results also show that more premortem groups listed rare frauds compared to the other two group structures. There was a negative relationship between the number of items listed and the assessed likelihood of fraud. Participants who estimated a higher likelihood of fraud provided a more complete mental simulation of how a fraud could be perpetrated. Study Two focuses on the individual brainstorming phase which may occur before the group brainstorming session. It examines whether giving additional brainstorming guidelines and task decomposing (in addition to the original brainstorming guidelines), improve performance compared to having only the original brainstorming guidelines. Both the additional brainstorming guidelines and the task decomposition treatments generated a larger number of potential frauds than the brainstorming guidelines treatment. Task decomposition helps participants focus equally on all task subcategories leading to a more diverse set of ideas.

Recent international regulatory reforms have put more responsibility on auditors for detecting financial statement fraud. The recent changes to international auditing standards make it compulsory for members of the audit team to discuss the susceptibility of an entity to fraudulent misstatements at the audit planning stage. These standards do not stipulate the format of these group discussions, nor provide any explicit guidelines on how to carry out effective discussions. This dissertation reports on two studies that examine different discussion techniques which could lead to a better identification of audit fraud risks at the audit planning stage, and may in turn help in fraud detection. Study One tests whether two enhanced forms of interacting group processes (brainstorming guidelines and premortem instructions) have advantages over an interacting group (without brainstorming guidelines). The brainstorming group is provided with Osborn???s (1957) original brainstorming guidelines. Premortem is a variation of the mental simulation idea developed by Klein (1999) invoking a scenario where participants actively search for a flaw in their plans. The auditors in both the brainstorming group treatment and the premortem group treatment generated a larger number of potential frauds than the interacting group treatment. These results were robust across a range of dependent variables used to measure quantity and quality of fraud items. The results also show that more premortem groups listed rare frauds compared to the other two group structures. There was a negative relationship between the number of items listed and the assessed likelihood of fraud. Participants who estimated a higher likelihood of fraud provided a more complete mental simulation of how a fraud could be perpetrated. Study Two focuses on the individual brainstorming phase which may occur before the group brainstorming session. It examines whether giving additional brainstorming guidelines and task decomposing (in addition to the original brainstorming guidelines), improve performance compared to having only the original brainstorming guidelines. Both the additional brainstorming guidelines and the task decomposition treatments generated a larger number of potential frauds than the brainstorming guidelines treatment. Task decomposition helps participants focus equally on all task subcategories leading to a more diverse set of ideas.

Large accounting firms have been structuring their audit divisions along industry lines for some years. Industry specialisation is seen as a means of differentiation between otherwise similar accounting firms. At the individual level industry specialists are identified as being so designated within their firm. They spend a substantial amount of their time auditing clients in that industry. The purpose of this study is to determine what industry specialist auditors do that is different and similar when working on industry-based tasks, one of which they specialise in. Behavioural decision theory is used to investigate the differences and similarities in the decision-making processes of industry specialist and other auditors. It is known that industry specialists perform better on tasks set in their industry. The purpose of this study is to learn why. To that end, the pre-information search, information search and decision processing phases of the decision-making process are examined. It is expected that industry specialists are more efficient and effective at each stage of the decision-making process when completing a case set in the industry they specialise in. Two controlled experiments were conducted in the offices of each of the Big 4 international accounting firms. Participants included manufacturing and superannuation industry specialists from each firm. Each participant was invited to take part in both experiments, which were conducted consecutively via the internet. The first experiment comprised two cases, one set in each industry setting (manufacturing and superannuation). Participants completed both cases. The purpose of the first experiment was to conduct a within-subject examination unveiling similarities and differences between industry specialists and other auditors during the pre-information search, information search and decision processing phases of the decision-making process. Their performance on each case was also monitored and measured. Significant results were found for information search and performance. Moderate results were found for one proxy each of the pre-information search and the decision processing phases. The relationship between efficiency at each stage of the decision-making process and performance was also measured. A significant relationship was found for the pre-information search and decision processing phases. The second experiment comprised two strategic business risk tasks set in each industry setting (manufacturing and superannuation). Participants completed both sets of tasks. The purpose of the second experiment was to examine effectiveness during the pre-information search (listing key strategic business risks), information search (listing key inputs) and decision processing (listing key processes) phases of the decision-making process and their ability to identify and list key outputs (accounts and assertions) for an identified risk (technological change for the manufacturing industry task and solvency due to insufficient funding for the superannuation industry task) within each industry setting. The results were very significant overall. Industry specialist auditors were able list more key strategic business risks, inputs, processes and outputs when the task was set in the industry in which they specialise. The relationship between effectiveness at each stage of the decision-making process and performance was also measured. A significant relationship was found between effectiveness in listing key inputs and effectiveness in listing key outputs (accounts).