Javascript 意外的令牌错误JSON

我目前正在尝试显示通过php文件加载的数据，我已经测试了.php文件，它可以正常工作并显示。我现在尝试使用JSON解析游戏的输出

这是我目前的代码

myGame.leadScreen = function(game) {
    this.xhr = new XMLHttpRequest();
    this.scoresObject;
    this.scoreText;
};

myGame.leadScreen.prototype = {

    create: function () {
        console.log("in Leaderboard screen");

        var scoreStyle = { font: "bold 20pt Arial", fill: "#ffffff", align: "center", stroke: "#444444", strokeThickness: 5 };
        this.scoreText = this.add.text(this.world.centerX, this.world.centerY, "High Scores", scoreStyle);
        this.scoreText.anchor.setTo(0.5, 0.5);



        this.xhr.open("POST", "leaderboard.php", true);
        this.xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        this.xhr.send();

        var self = this;
        this.xhr.onload = function() {

            if (this.readyState==4 && this.status==200) {
                self.scoresObject = JSON.parse(this.resoponseText);
                self.scoreText.text = self.scoresObject[0].name + " " +self.scoresObject[0].score;
            }


        }


        }

};

错误来自JSON.parse行，欢迎使用任何指针

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谢谢

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