## 5 Conclusions and Future Work  
In conclusion, the goal of this study was to understand what is being done to promote a better intervention or post-intervention approach for children with SSD, while being able to support parents and SLTs alike. The literature review revealed that some seek to answer it through technology while others through a social approach and/or gamified activities. It also became clear the richness of scientific areas involved but also how niche certain subjects can be. While more research is undoubtedly needed, a unified method or framework to address SSD intervention or post-intervention tools is lacking. There is a real desire from SLTs, expressed through the questionnaire, to have more and better tools, to be able to quantify and qualitatively grade the activities sent home. Activities have to allow personalisation, localisation and translation and above all, they cannot disrupt the home environment social fabric. Regarding IoT and TUI and the briefly mentioned IoA, one has to be aware of existing different views on what TUI are, as well as proposed definitions [136] and the need to establish clear borders, previously defined by [PERSON] and [PERSON] [44] in their seminal work \"Tangible Bits: Towards Seamless Interfaces between People, Bits and Atoms\", TUI are a form of interaction or interface with the user, allowing a richer and more natural exploration, experience, and data manipulation. Internet of Things devices, on the other hand, are the architecture or infrastructure, composed of sensors and actuators connected to the Internet that can retrieve, store, and transmit data, as well as control, at-a-distance, physical devices [137]. While IoT devices have some form of interaction (via a screen or keyboard, for example), some point to the still prevalent vendor centric approach, as opposed to the user or person centric approach, that forces the users to possess a certain degree of technological ease and familiarity with the technologies in use [138]. Therefore, TUI are the physical interface that we can use and that have been designed to give a rich user experience while allowing to control the IoT device, which is responsible for the data collection, storeing/manipulation and communication with the outside world via the Internet. The complexity of IoT devices, available technologies and protocols have been previously discussed [79; 139; 140] and are outside the scope of this article. For our IoA approach we have opted for a simplified approach of IoT architecture, commonly known as _Three Layer Architecture_, with the layers being [140]:  
* (i) the _application layer_, responsible for providing the user with resources or communication protocols, specific to the user's needs. It allows effective communication with other applications or network;
* (ii) the _network layer_ provides connection and communication with other devices. It can also be used for data processing in certain protocols such as fog, edge, or cloud computing;* (iii) the _perception layer_, which is the physical layer, responsible for sensing and acting on the environment. In Table 4 these layers are further expanded and TUI is introduced, creating the IoA. Brief explanations of what the layers may contemplate or connect to, are also included. This is by no means a final word on this vast and yet niche subject. More research is needed in various topics and a broader scope in the research, in order to gain a better understanding the needs of the end users, the varied approaches in speech and language intervention, and the impact interacting with technology can have. Regarding future work, we will involve some end users, as advised by [121, 122, 123]. The end users invited for co-design will be SLTs, despite our initial plans to involve both children and parents. We acknowledge the complexity of designing \"for\" children as discussed in [13, 141] as opposed to design \"with\" children [142].