Edit in JSFiddle

<div data-bind="foreach: techniques">
    <label>
        <input type="radio" data-bind="value: value, checked: $parent.selectedTechnique" />
        <span data-bind="text: text"></span>
    </label>
</div>
<div data-bind="text: selectedTechnique"></div>

function ViewModel() {
    var self = this;
    self.techniques = [{
        text: "ASP.NET Web Forms",
        value: "webforms"
    }, {
        text: "ASP.NET MVC",
        value: "mvc"
    }, {
        text: "ASP.NET Web API",
        value: "webapi"
    }];

    self.selectedTechnique = ko.observable("");
}

ko.applyBindings(new ViewModel());